(Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

This state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.

2022 CALIFORNIA MECHANICAL CODE 505

506 2022 CALIFORNIA MECHANICAL CODE

» »» »

RpPz + RaAz

Vot = Ez

5 x 100 + 0.06 x 2000

1.0

APPENDIX H

EXAMPLE CALCULATION OF OUTDOOR AIR RATE

The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency, or referenced in the adopting ordinance.

H 101.0 Example Calculation of Outdoor Air Rate. H 101.1 Example Calculation. Determine the outdoor air rate required for a single zone AC unit serving an interior 2000 square feet (185.81 m ² ) conference/meeting room with a design occupancy of 100 people. The system supplies and returns air from the ceiling. (See Chapter 4 of this code for guidelines)

Solution: In accordance with Table 403.2.2, the zone air distribution effectiveness is 1.0 since the system supplies cooling only from the ceiling. Using the rates from Table 402.1 for a conference/meeting room, the minimum system outdoor air rate is calculated to be:

(Equation H 101.1)

= 620 cubic feet per minute (ft ³ /min)

Where:

Az = zone floor area: the net occupiable floor area of

the zone in square feet. Pz = zone population: The largest number of people

expected to occupy the zone during typical usage. Where the number of people expected to occupy the zone fluctuates, Pz shall be permitted to be estimated based on averaging approaches described in Section 403.6.1. Where Pz cannot be accurately predicted during design, it shall be estimated based on the zone floor area and the default occupant density in accordance with Table 402.1. Rp = outdoor airflow rate required per person in accor dance with Table 402.1 . Ra = outdoor airflow rate required per unit area in accor dance with Table 402.1. Ez = zone air distribution effectiveness in accordance

re Pz cannot be accurately predicted during design, it shall be estimated based on the zone floor area and the default occupant density in accordance with Table 402.1. Rp = outdoor airflow rate required per person in accor dance with Table 402.1 . Ra = outdoor airflow rate required per unit area in accor dance with Table 402.1. Ez = zone air distribution effectiveness in accordance

with Table 403.2.2. For SI units: 1 square foot = 0.0929 m ², 1 cubic foot per minute = 0.00047 m ³ /s

2022 CALIFORNIA MECHANICAL CODE 507

508 2022 CALIFORNIA MECHANICAL CODE

USEFUL TABLES

CONVERSION TABLES

Note: The information contained in these tables are not part of this American National Standard (ANS) and have not been processed in accordance with ANSI’s requirements for an ANS. As such, these tables may contain material that has not been subjected to public review or a consensus process. In addition, they do not contain requirements necessary for conformance to the standard.

UNIT CONVERSIONS

MULTIPLY BY TO OBTAIN

Acres.........................................................................43 560 ............................Square feet (ft ² ) Acre-feet...................................................................43 560 ............................Cubic feet (ft ³ ) Acre-feet.................................................................325 851 ............................Gallons (U. S. liquid) Atmosphere (atm).........................................................76.0 ............................Centimeters of mercury (0°C) Atmosphere (standard) (atm)........................................76.0 ............................Centimeters of mercury (0°C) Atmosphere (standard) (atm)......................................33.90 ............................Feet of water (4°C) Atmosphere (standard) (atm)......................................29.92 ............................Inches of mercury Atmosphere (standard) (atm)..............................101.32501 ............................Kilopascals (kPa) Atmosphere (standard) (atm)......................................14.70 ............................Pounds-force/square inch (lbf/in ² ) Barrels..............................................................................42 ............................Gallons (gal) Barrels...................................................................158.9873 ............................Liters (L) British thermal units (Btu)....................................1055.055 ............................Joules (J) British thermal units/hour (Btu/h) ........................0.000293 ............................Kilowatts (kW) British thermal units/hour (Btu/h) ..............................0.293 ............................Watts (W) British thermal unit hour (Btu/h)..........................1.055056 ............................Kilojoules (kJ) British thermal unit hour (Btu/h)..........................1055.056 ............................Joule (J) British thermal units/minute (Btu/min) ......................12.97 ............................Foot pounds-force/second (ft•lbf/s) British thermal units/minute (Btu/min) ..................0.02358 ............................Horsepower (hp) (international) British thermal unit per hour square

foot degree Fahrenheit [Btu/(h•ft ² •°F)] .............5.678263 ............................Watt per square meter kelvin [W/(m ² •K)] British thermal unit inch per hour

foot degree Fahrenheit [Btu•in/(h•ft•°F)] ......0.14442279 ............................Watt per meter kelvin [W/(m•K)] Candelas per square inch (cd/in ² )................1.550003 x 10 ³ ............................Candela per square meters (cd/m ² ) Celsius (°C)......................................................°C + 273.15 ............................Kelvin (k) Celsius (°C)....................................................1.8 x °C + 32 ............................Fahrenheit (°F) Centimeters (cm) ......................................................0.3937 ............................Inches (in) Centimeters of mercury (0°C) ................................0.01316 ............................Atmosphere (standard) Centimeters of mercury (0°C) ....................................0.446 ............................Feet of water (4°C) Centimeters of mercury (0°C) ....................................27.84 ............................Pounds-force/square feet (lbf/ft ² ) Centimeters of mercury (0°C) ..................................0.1934 ............................Pounds-force/square inch (lbf/in ² ) Circumference ............................................................6.283 ............................Radians (rad) Cubic feet (ft ³ ) .............................................................1728 ............................Cubic inches (in ³ ) Cubic feet (ft ³ ) ..........................................................0.0283 ............................Cubic meters (m ³ ) Cubic feet (ft ³ ) ........................................................0.03704 ............................Cubic yards (yd ³ ) Cubic feet (ft ³ ) ........................................................7.48052 ............................Gallons (U.S. liquid) (gal) Cubic feet (ft ³ ) ............................................................28.32 ............................Liters (L) Cubic feet (ft ³ ) ............................................................29.92 ............................Quarts (U.S. liquid) Cubic feet/hour (ft ³ /h)...............................................0.0283 ............................Cubic meters/hour (m ³ /h)

2022 CALIFORNIA MECHANICAL CODE 509

USEFUL TABLES

UNIT CONVERSIONS (continued)

MULTIPLY BY TO OBTAIN

Cubic feet/minute (ft ³ /min)..................................0.000472 ............................Cubic meters/second (m ³ /s) Cubic feet/minute (ft ³ /min)......................................0.1247 ............................Gallons/second Cubic feet/minute (ft ³ /min)....................................0.47194 ............................Liters/second (L/s) Cubic feet/second (ft ³ /s) ....................................646 316.89 ............................Gallons/day Cubic feet/second (ft ³ /s) .........................................448.831 ............................Gallons/minute (gpm) Cubic inches (in ³ )...............................................1.64 x 10 ^-5 ............................Cubic meters (m ³ ) Cubic inches (in ³ ) ...................................................0.01639 ............................Liters (L) Cubic meters (m ³ ).....................................................264.17 ............................Gallons (U.S. liquid) Cubic yards (yd ³ ).............................................................27 ............................Cubic feet (ft ³ ) Cubic yards (yd ³ )....................................................0.76455 ............................Cubic meters (m ³ ) Cubic yards (yd ³ )......................................................201.97 ............................Gallons (U.S. liquid) Degrees (deg)............................................................0.0174 ............................Radians (rad) Fahrenheit (°F)...................................................(°F-32)/1.8 ............................Celsius (°C) Feet (ft) .....................................................................0.3048 ............................Meters (m) Feet (ft) .......................................................................304.8 ............................Millimeters (mm) Feet of water (4°C)...................................................0.0295 ............................Atmosphere (standard) (atm) Feet of water (4°C)...................................................0.8827 ............................Inches of mercury (0°C) Feet of water (4°C).....................................................62.43 ............................Pounds-force/square feet Feet of water (4°C)...................................................0.4335 ............................Pounds-force/square inch Feet/minute (ft/min)................................................0.01667 ............................Feet/second (ft/s) Feet/minute (ft/min)................................................0.01136 ............................Miles/hour (mi/h) Feet/second (ft/s) ......................................................0.3048 ............................Meters/second (m/s) Feet/second (ft/s) ......................................................0.6818 ............................Miles/hour (mi/h) Feet/second (ft/s) ....................................................0.01136 ............................Miles/minute (mi/min) Foot lambert (fL) ..................................................3.426259 ............................Candela per square meter (cd/m ² ) Foot pounds-force (ft•lbf)...........................................1.355 ............................Joules (J) Foot pounds-force/minute (ft•lbf/min).............2.260 x 10 ^-5 ............................Kilowatts (kW) Foot pounds-force/second (ft•lbf/s)..................1.356 x 10 ^-3 ............................Kilowatts (kW) Gallons (U.S. liquid) (gal).............................................231 ............................Cubic inches (in ³ ) Gallons (U.S. liquid) (gal)....................................0.003785 ............................Cubic meters (m ³ ) Gallons (U.S. liquid) (gal)........................................0.1337 ............................Cubic feet (ft ³ ) Gallons (U.S. liquid) (gal)..........................................3.785 ............................Liters (L) Gallons (U.S. liquid) (gal).................................................4 ............................Quarts (U.S. liquid) Gallons/day...........................................................4.3 x 10 ^-5 ............................Liters/second Gallons/minute (gal/min) (gpm)...............................8.0208 ............................Cubic feet/hour (ft ³ /h) Gallons/minute (gal/min) (gpm).....................0.003785412 ............................Cubic meters/minute (m ³ /min) Gallons/minute (gal/min) (gpm).............................0.00223 ............................Cubic feet/second (ft ³ /s) Gallons/minute (gal/min) (gpm).................6.309020 x 10 ^-5 ............................Cubic meters/second (m ³ /s) Gallons/minute (gal/min) (gpm).............................0.06309 ............................Liters/second (L/s) Grains (gr) ........................................................0.00006479 ............................Kilograms (kg) Horsepower (hp).......................................................0.7457 ............................Kilowatts (kW) Horsepower-hours............................................2.684 x 10 ⁺⁶ ............................Joules (J) Horsepower-hours ....................................................0.7457 ............................Kilowatt-hours (kW•h) Inch (water column at 60°F)...................................0.24884 ............................Kilopascals (kPa) Inches (in).....................................................................2.54 ............................Centimeters (cm)

..................Joules (J) Horsepower-hours ....................................................0.7457 ............................Kilowatt-hours (kW•h) Inch (water column at 60°F)...................................0.24884 ............................Kilopascals (kPa) Inches (in).....................................................................2.54 ............................Centimeters (cm)

510 2022 CALIFORNIA MECHANICAL CODE

USEFUL TABLES

UNIT CONVERSIONS (continued)

MULTIPLY BY TO OBTAIN

Inches (in).....................................................................25.4 ............................Millimeters (mm) Inches/hour ...................................................................25.4 ............................Millimeters/hour (mm/h) Inches of mercury (0°C).........................................0.03342 ............................Atmosphere (standard) (atm) Inches of mercury (0°C).............................................1.133 ............................Feet of water (4°C) Inches mercury (0°C) ...............................................3.3863 ............................Kilopascals (kPa) Inches of mercury (0°C)...........................................0.4912 ............................Pounds-force/square inch Inches of water (4°C)............................................0.002458 ............................Atmosphere (standard) (atm) Inches of water (4°C)..............................................0.07356 ............................Inches of mercury (0°C) Inches of water (4°C)..................................................5.202 ............................Pounds-force/square feet Inches of water (4°C)..............................................0.03613 ............................Pounds-force/square inch Joules (J)...........................................................9.480 x 10 ^-4 ............................British thermal units (Btus) Joules (J)...................................................................0.7376 ............................Foot-pounds Joules (J)...........................................................2.778 x 10 ^-4 ............................Watt-hours Kelvin (K).........................................................°K - 273.15 ............................Celsius (°C) Kilograms (kg)..........................................................2.2046 ............................Pounds (lbs) Kilograms (kg) .................................................1.102 x 10 ^-3 ............................Tons (short) Kilopascals (kPa)..................................................0.145038 ............................Pounds-force/square inch Kilometers (km)........................................................0.6214 ............................Miles (statute) Kilometers/hour (km/h)............................................0.6214 ............................Miles/hour (mi/h) Kilowatts (kW) .......................................................3412.14 ............................British thermal units/hour (Btus/hour) Kilowatts (kW) ...........................................................1.341 ............................Horsepower (hp) Kilowatt-hours.............................................................3413 ............................British thermal units (Btus) Kilowatt-hours.................................................2.655 x 10 ⁺⁶ ............................Foot-pounds (ft•lbs) Kilowatt-hours.....................................................3.6 x 10 ⁺⁶ ............................Joules (J) Kip (1000 lbf).......................................................4.448222 ............................Kilonewtons (kN) Kip-foot ..................................................................1.35671 ............................Kilonewton meters (kN•m) Kips per square inch (kip/in ² )...................................6.8947 ............................Megapascals (MPa) Lambert (la).................................................3.183099 x 10 ³ ............................Candela per square meter (cd/m ² ) Liters (L).................................................................0.03531 ............................Cubic feet (ft ³ ) Liters (L).....................................................................61.02 ............................Cubic inches (in ³ ) Liters (L).....................................................................0.001 ............................Cubic meters (m ³ ) Liters (L)...................................................................0.2642 ............................Gallons (U.S. liquid) Lumens per square foot (lm/ft ² ) (footcandle).......10.76391 ............................Lux (lx) Meters (m) ..................................................................3.281 ............................Feet (ft) Meters (m) ..................................................................39.37 ............................Inches (in) Meters (m) ..................................................................1.094 ............................Yards Meters/second (m/s) ...................................................3.281 ............................Feet/second (ft/s) Meters/second (m/s) ...................................................2.237 ............................Miles/hour (mi/h) Miles (mi) ....................................................................5280 ............................Feet (ft) Miles (statute).............................................................1.609 ............................Kilometers (km) Miles/hour (mi/h).............................................................88 ............................Feet/minute (ft/min) Miles/hour (mi/h)........................................................1.467 ............................Feet/second (ft/s) Miles/hour (mi/h)..................................................1.609344 ............................Kilometers/hour (km/h) Miles/hour (mi/h)........................................................26.82 ............................Meters/minute (m/min) Miles/hour (mi/h)....................................................0.44704 ............................Meters/second (m/s)

.Feet/second (ft/s) Miles/hour (mi/h)..................................................1.609344 ............................Kilometers/hour (km/h) Miles/hour (mi/h)........................................................26.82 ............................Meters/minute (m/min) Miles/hour (mi/h)....................................................0.44704 ............................Meters/second (m/s)

2022 CALIFORNIA MECHANICAL CODE 511

USEFUL TABLES

UNIT CONVERSIONS (continued)

MULTIPLY BY TO OBTAIN

Millimeters (mm)............................................................0.1 ............................Centimeters (cm) Millimeters (mm)....................................................0.03937 ............................Inches (in) Millimeters (mm)........................................................0.001 ............................Meters (m) Minutes (min).............................................2.908882 x 10 ^-4 ............................Radians (rads) Ounces/square inch (oz/in ² )..................................43.94185 ............................Kilograms/square meter (kg/m ² )

Millimeters (mm)........................................................0.001 ............................Meters (m) Minutes (min).............................................2.908882 x 10 ^-4 ............................Radians (rads) Ounces/square inch (oz/in ² )..................................43.94185 ............................Kilograms/square meter (kg/m ² )

Ounces/square feet (oz/ft ² ) ...............................0.03051517 ............................Kilograms/square meter (kg/m ² ) Ounces (oz).............................................................0.02834 ............................Kilograms (kg) Ounces (oz)...........................................................29.57353 ............................Millimeters (mL) Pints....................................................................0.4731765 ............................Liters (L) Pound-force feet (lbf•ft) .......................................1.355818 ............................Newton meters (N•m) Pound-force inch (lbf•in)....................................0.1129848 ............................Newton meters (N•m) Pound-force per foot (lbf/ft) ...................................14.5939 ............................Newton meters (N•m) Pound-force per square foot (lbf/ft ² ) ....................47.88026 ............................Pascals (Pa) Pound-force per square inch (lbf/in ² ) .....................6.89476 ............................Kilopascals (kPa) Pound-force per inch (lbf/in)................................175.1268 ............................Newton meters (N•m) Pounds/cubic inch (lb/in ³ )...........................2.767990 x 10 ⁴ ............................Kilograms/cubic meter (kg/m ³ ) Pounds/cubic yard (lb/yd ³ ) .................................0.5932764 ............................Kilograms/cubic meter (kg/m ³ ) Pounds (lb)..............................................................0.45359 ............................Kilograms (kg) Pounds/cubic foot (lb/ft ³ ) .......................................16.0184 ............................Kilograms/cubic meters (kg/m ³ ) Pounds/foot (lb/ft) ....................................................1.4881 ............................Kilograms/meters (kg/m) Pounds/square inch (lb/in ² ).........................................703.1 ............................Kilograms-force/square meter (kg/m ² ) Pounds/square foot (lb/ft ² )....................................4.882427 ............................Kilograms-force/square meter (kg/m ² ) Pounds-force (lbf).....................................................4.4482 ............................Newtons (N) Pounds-force/square inch (psi)...............................0.06805 ............................Atmosphere (standard) (atm) Pounds-force/square inch (psi)...................................2.307 ............................Feet of water (4°C) Pounds-force/square inch (psi)...................................2.036 ............................Inches of mercury (0°C) Pounds-force/square inch (psi)...............................6.89476 ............................Kilopascals (kPa) Quarts (U.S. dry) (dry qt) ...........................................67.20 ............................Cubic inches (in ³ ) Quarts (U.S. liquid) (liq qt) ........................................57.75 ............................Cubic inches (in ³ ) Quarts (liquid) ....................................................0.9463529 ............................Liters (L) Radians (rads).............................................................57.30 ............................Degrees (deg) Seconds (s) ..................................................4.848137 x10 ^-6 ............................Radians (rads) Square acre ...........................................................0.404687 ............................Square kilometers (km ² ) Square feet (ft ² )..............................................................144 ............................Square inches (in ² ) Square feet (ft ² ).........................................................0.0929 ............................Square meters (m ² ) Square inches (in ² )....................................................645.16 ............................Square millimeters (mm ² ) Square inches (in ² )................................................0.000645 ............................Square meters (m ² ) Square meters (m ² ) ......................................................1550 ............................Square inches (in ² ) Square miles (mi ² ) .........................................................640 ............................Acres Square miles (mi ² ) ................................................2.589988 ............................Square kilometers (km ² ) Square millimeters (mm ² ) ................................1.550 x 10 ^-3 ............................Square inches (in ² ) Square yards (yd ² ) .............................................................9 ............................Square feet (ft ² ) Square yards (yd ² ) ..............................................0.8361274 ............................Square meters (m ³ ) Temperature (°C) + 17.28 ..............................................1.8 ............................Temperature (°F) Temperature (°F) – 32 ....................................................5 ⁄ 9 ............................Temperature (°C)

/sup> ) Square yards (yd ² ) ..............................................0.8361274 ............................Square meters (m ³ ) Temperature (°C) + 17.28 ..............................................1.8 ............................Temperature (°F) Temperature (°F) – 32 ....................................................5 ⁄ 9 ............................Temperature (°C)

512 2022 CALIFORNIA MECHANICAL CODE

USEFUL TABLES

UNIT CONVERSIONS (continued)

MULTIPLY BY TO OBTAIN

Ton-force (tonf) (2000 lbf)...................................8.896443 ............................Kilonewtons (kN) Ton-force foot (tonf•f/ft) ........................................2.71342 ............................Kilonewton meters (kN•m) Ton-force per square foot (tonf/ft ² ) ........................95.7605 ............................Kilopascals (kPa) Ton-force per square inch (tonf/in ² ).......................13.7895 ............................Megapascals (MPa) Tons (metric) ...............................................................1000 ............................Kilograms (kg) Tons (long) (2240 lbs)..........................................1016.047 ............................Kilograms (kg) Tons (short) .................................................................2000 ............................Pounds (lbs) Watts.........................................................................3.4121 ............................British thermal units per hour (Btus/hour) Watts.................................................................1.341 x 10 ^-3 ............................Horsepower (hp) Yards (y)...................................................................0.9144 ............................Meters (m)

Sl SYMBOLS AND PREFIXES

SI PREFIXES

2022 CALIFORNIA MECHANICAL CODE 513

USEFUL TABLES

AREAS AND CIRCUMFERENCES OF CIRCLES

514 2022 CALIFORNIA MECHANICAL CODE

APPROXIMATE MINIMUM THICKNESS FOR CARBON SHEET STEEL CORRESPONDING

TO MANUFACTURER’S STANDARD GAUGE AND GALVANIZED SHEET GAUGE NUMBERS

USEFUL TABLES

For SI units: 1 inch = 25.4 mm

• The thickness of the sheets set forth in the code correspond to the thickness shown under these columns. They are the approximate minimum thicknesses and are based on the following references:

Carbon Sheet Steel—Thickness 0.071 inch (1.803 mm) and over:

ASTM A 568, Table 3, Thickness Tolerances of Hot-Rolled Sheet (Carbon Steel).

Carbon Sheet Steel—Thickness less than 0.071 inch (1.803 mm):

ASTM A 568, Table 23, Thickness Tolerances of Cold-Rolled Sheet (Carbon and High-Strength Low Alloy).

Galvanized Sheet Steel—All thicknesses:

ASTM A 653, Table 4, Thickness Tolerances of Hot-Dip Galvanized Sheet.

Minimum thickness is the difference between the thickness equivalent of each gauge and the maximum negative tolerance for the widest rolled width.

2022 CALIFORNIA MECHANICAL CODE 515

516 2022 CALIFORNIA MECHANICAL CODE

INDEX

© 2021 International Association of Plumbing and Mechanical Officials. All rights reserved. The copyright in this index is separate and distinct from the copyright in the document that it indexes. The licensing provisions set forth for the document are not applicable to this index. This index may not be reproduced in whole or in part by any means without the express written permission of IAPMO.

– A – ABSORPTION SYSTEM

Cooling system . . . . . . . . . . . . . . . . . . . . . . . Chapter 11 Duct system . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 6 ABSORPTION UNIT

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 Labeling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307.4 ACCEPTED ENGINEERING

PRACTICE . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0, 309.1 ACCESS PANELS

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 Ducts connected to

duct furnaces . . . . . . . . . . . . . . . . . . . . . . . . . . 905.3 Exhaust systems,

commercial kitchen. . . . . . . 510.1.5, 510.3.1, 510.3.6,

510.3.6.2, 514.4.8, 514.4.10 ACCESSIBILITY FOR

Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105.1 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.0 ACCESSIBILITY OF

Appliances and equipment . . . . . . . 304.1, 304.3, 304.4 Appliances and equipment

on roof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.3 Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1010.0 Cleanouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 802.5.10 Draft hoods. . . . . . . . . . . . . . . . . . . . . . . . . . . . 802.12.5 Drips, fuel gas piping . . . . . . . . . . . . . . . . . . . . 1310.9.1 Evaporative coolers. . . . . . . . . . . . . . . . . . . . . . . . 933.3 Fire dampers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 606.5 Floor furnace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 906.8 Fuel gas meters . . . . . . . . . . . . . . . . . 1308.6.1, D 104.2 Fuel gas piping . . . . . . . . . . . . . . . . . . . . . . . 1310.3.3.1 Fuel gas pressure regulators . . . . . . . . . . . . . .1308.7.2,

1310.5.1 Grease filters. . . . . . . . . . . . . . . . . . . . . . . . . . 509.2.3.2 Lapped flanges . . . . . . . . . . . . . . . . . . . . . . . 1308.5.9.6 Motors and fans, exhaust systems . . . . . . . . . . . . 503.1 Refrigeration equipment . . . . . . . . . . . . . . . . . . . 1105.3 Smoke dampers . . . . . . . . . . . . . . . . . . . . . . . . . . 606.5 ACCESSIBLE

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 Easily, definition. . . . . . . . . . . . . . . . . . . . . . . . . . . 207.0 Readily, definition . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 ADMINISTRATION . . . . . . . . . . . . . . . . . . . . . . . . Chapter 1

California . . . . . . . . . . . . . . . . . . . . Chapter 1, Division I General . . . . . . . . . . . . . . . . . . . . Chapter 1 , Division II AIR

Balancing. . . . . . . . . . . . . . . 314.0, 511.3.1, E 503.6.5.3

Classification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403.9 Combustion . . . . . . . . . . . . . . . . . (see Combustion Air) Dilution . . . . . . . . . . . . . 203.0, 701.1, 802.6.3.1, 902.12 Ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (see Ducts) Economizer . . . . . . . . . . . . . . . . . (see Economizer, air) Exhaust . . . . . . . . . . . . . . . . . . . . . . . (see Air, exhaust) Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . (see Filters, air) Furnace . . . . . . . . . . . . . . . . . (see Furnaces, warm air) Heaters. . . . . . . . . . . . . . . . . . . . . . . . . (see Heater, air) Makeup. . . . . . . . . . . . . . . 203.0, 403.7, 504.1, 504.4.1,

511.3, 517.1.3, 517.6.1, 517.6.2, 701.3, 931.5.4, 1106.7 Moving Systems. . . . . . . . . . . . . . . . . . . . . 203.0, 609.1 Outside . . . . . . . . . . . . . . . . . . . . . . . 203.0, 311.1, 311.3 Pollution control

devices. . . . . . . . . . . . . . . . . . 203.0, 512.3.3, 512.3.5 Recirculation. . . . . . . . . . . . . . . . . 403.7, 403.9, 512.3.5 Replacement . . . . . . . . . . . . . . . . . . . (see Air, makeup) Return. . . . . . . . . . . . . . . . . . . 203.0, 311.1, 311.3, 311.4 Supply . . . . . . . . . . . . . . 203.0, Chapter 4, 914.5, 915.5 Transfer . . . . . . . . . . . . . . . 403.7, 603.9.2, E 503.5.11.1 Ventilation. . . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 4 AIR CONDITIONED

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 AIR CONDITIONING

Coils. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 903.2.5 Gas fired type . . . . . . . . . . . . . . . . . . . . . . . . . . . . 903.2 Refrigerant port protection . . . . . . . . . . . . . . . . . 1105.11 System test . . . . . . . . . . . . . . . . . . . . . . . . . . . . E 805.0 System water use . . . . . . . . . . . . . . . . . . . . . . . E 403.0 AIR-HANDLING UNIT

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 Ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 6 System test . . . . . . . . . . . . . . . . . . . . . . . . . . . . E 805.0 AIR, EXHAUST

Cross Contamination. . . . . . . . . . . . . . . . . . . . . . 603.10 Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 Openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305.3.2 Grease filters. . . . . . . . . . . . . . . . . . . . . . . . . . 509.2.3.1 Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403.7 Volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 511.2.2 ALARMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416.0, 418.5 ALTERNATE MATERIALS AND METHODS

CONSTRUCTION EQUIVALENCY . . . . . . . . . . . . . . 302.2 ALTERNATIVE ENGINEERING DESIGN

Design approval. . . . . . . . . . . . . . . . . . . . . . . . . 302.3.4 Design document. . . . . . . . . . . . . . . . . . . . . . . . 302.3.3 Design review . . . . . . . . . . . . . . . . . . . . . . . . . . 302.3.5

2022 CALIFORNIA MECHANICAL CODE 517

INDEX

Inspection and testing . . . . . . . . . . . . . . . . . . . . 302.3.6 Permit application . . . . . . . . . . . . . . . . . . . . . . . 302.3.1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . 302.3.2 AMMONIA . . . . . . . . . . . . . . . . . . . . 1102.1, 1104.4, 1102.2,

1102.3, 1106.2, Table 1102.3 ANCHORAGE OF

Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.4 Boilers and pressure vessels . . . . . . . . . . . . . . . . 1001.5 Cooling towers. . . . . . . . . . . . . . . . . . . . . . . . . . . 1120.0 Evaporative condensers . . . . . . . . . . . . . . . . . . . 1120.0 Fluid coolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1120.0 Refrigeration equipment

and piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1105.2 ANODELESS RISER . . . . . . . . . . . . . . . . 203.0, 1308.5.4.2 APPEALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107.0 APPLIANCE FLUE OUTLET

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 APPLIANCES

Access to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .304.0 Air filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .936.0 Approval of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301.2 Clearance . . . . . . . . . . . . . . . .303.3, 303.10, 303.10.1,

Table 303.10.1, Table 802.7.3.3 Closed combustion

solid-fuel-burning, definition . . . . . . . . . . . . . . . 205.0 Clothes dryers . . . . . . . . . . . . . . . . . (see Clothes dryer) Cooking . . . . . . . . . . . . . . . 517.2–517.2.2, 517.7, 517.7.2,

517.8, 517.8.1, 920.0, 921.0, 923.0 Decorative, vented . . . . . . . . . . . . . . 224.0, 911.0, 932.0 Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 Direct vent. . . . . . . . . . . . . . . . . 206.0, 802.2.6, 802.8.2 Downdraft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 518.0 Electric cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . 307.3 Electric heating . . . . . . . . . . . 207.0, 307.2, 903.1, 905.8 Fan-assisted combustion. . . . . . . . . . . . . . 203.0, 802.6.2.1, 802.10.2 Floor furnaces . . . . . . . . . (see Furnaces, floor furnace) Food service. . . . . . . . . . . . . . . . . . . . . . . . 918.0, 919.0 Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306.1 Household cooking . . . . . . . . . . . . . . . . . . . . . . . . 920.0 Illuminating . . . . . . . . . . . . . . . . . . 924.0, Table 924.2.1 In attics . . . . . . . . . . . . . . . . . . . . . . . . . . 304.4–304.4.4 In garages . . . . . . . . . . . . . . . . . . 305.1, 305.1.1, 905.7 In manufactured housing . . . . . . . . . . . . . . . . . . . 930.0 In under-floor spaces . . . . . . . . . . . . . . . 304.4–304.4.4 Kilns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 931.0 Labeling of. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307.0 Listed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.1 Location of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305.0 Low-heat. . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0, 801.2 Medium-heat. . . . . . . . . . . . . . . . . . . . . . . . 203.0, 801.2 Movement of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.5 Oil-burning. . . . . . . . . . . . . . . . . . 301.5, 904.11, 906.13,

907.4, 917.6, 921.3 On roofs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.8

Open-top broiler units . . . . . . . . . . . . (see Broiler units) Outdoor cooking . . . . . . . . . . . . . . . . . . . . . . . . . . 923.0 Pit location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .305.2 Protection against

flood damage . . . . . . . . . . . . . . . . . . . . . . . . . . 305.3 Range . . . . . . . . . . . . . . . . . . . . . . . 920.1, 921.1, 921.3 Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 934.0 Refrigerators . . . . . . . . . . . . . . . . . . (see Refrigerators) Room heaters. . . . . . . . . . . . . . . . . . (see Heater, room) Solid-fuel burning . . . . . . 902.10, 904.10, 916.3, 1002.4 Unit heaters . . . . . . . . . . . . . . . . . . . . . . . . (see Heater) Unlisted . . . . . . . . . . . . . . . . . . . . . . . . . . 303.3, 303.10 Venting of . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 8 APPROVED

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 APPROVED TESTING AGENCY

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 ATTIC INSTALLATIONS

Appliances . . . . . . . . . . . . . . . . . . . . . . . 304.4–304.4.4 AUTHORITY HAVING JURISDICTION

Authority to disconnect

of gas piping . . . . . . . . . . . . . . . . . . . . . . . . . . 1306.0 Authority to render gas service . . . . . . . . . . . . . . 1305.0 Condemn equipment. . . . . . . . . . . . . . . . . . . . . . . 106.6 Connection approval . . . . . . . . . . . . . . . . . . . . . . . 105.4 Cooperation of other

officials and officers . . . . . . . . . . . . . . . . . . . . . . 103.1 Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 Deputize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.1 Disconnect utilities in

emergencies, to. . . . . . . . . . . . . . . . . . . . . . . . . 106.5 Inspections . . . . . . . . . . . . . . . . . . . . . . . . 105.0, 1013.0 Issues permits. . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.4 Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.2 Limitations of authority. . . . . . . . . . . . . . . . . . . . . . 107.2 Powers and duties. . . . . . . . . . . . . . . . . . . . . . . . . 103.0 Right of entry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.4 Stop orders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106.4 Temporary connection . . . . . . . . . . . . . . . 105.4, 1307.1 Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . 105.3, 302.2.1 AUTOMATIC

CONTROL DEVICES . . . . . . . . . . . . . . . . . . . . . . . . 306.0 AUTOMATIC, BOILERS . . . . . . . . . . . . . . . (see Boiler types,

automatic) AZEOTROPE

Allowable quantities . . . . . . . . . . . . . . . . . . Table 1102.3 Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0

– B – BAFFLE PLATE . . . . . . . . . . . . . . . . . . . . 204.0, 509.2.2.1,

509.2.2.2, 509.2.2.3 BALANCING, HVAC . . . . . . . . . . . . . . . . . . . 314.0, E 502.3

E 503.6.5.3–E 503.6.5.3.2 BLEED LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 902.16 BOARD OF APPEALS . . . . . . . . . . . . . . . . . . . . . . . . . 107.0

518 2022 CALIFORNIA MECHANICAL CODE

BOILER

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.0 General requirements. . . . . . . . . . . . . . . . . . Chapter 10 In hydronic systems . . . . . . . . . . . . . . . . . . . . . . . 1207.2 Mounting of. . . . . . . . . . . . . . . . . . . . . . 1001.5, 1001.5.1 Operation and maintenance . . . . . . . . . . . . . . . . 1014.0 Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.0, 1001.2 Venting of. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1001.6 BOILER TYPES

Automatic . . . . . . . . . . . 203.0, 1003.2.1, Table 1003.2.1 Central heating. . . . . . . . . . . . . . . . . . . . . . 303.2, 904.0 Condensing . . . . . . . . . . . . . . . . . . . . . . . . . . . 1207.2.1 Electric . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1002.3 High-pressure, definition . . . . . . . . . . . . . . . . . . . . 204.0 Low-pressure hot-water-heating,

definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 Low-pressure steam-heating,

definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 Miniature Boiler. . . . . . . . . . . . . . . . . . . . . 215.0, 1013.4 Noncondensing. . . . . . . . . . . . . . . . . . . . . . . . . 1207.2.2 Oil burning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1002.2 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . 1010.2, 1013.4 Solid fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1002.4 Steam and hot water . . . . . . . . . . . 904.4, 904.5, 904.6,

904.8, 1010.3, 1010.4 BONDING CONDUCTOR

OR JUMPER . . . . . . . . . . . . . . . . . . . . . . . . . . .204.0, 1311.0 BRAZED JOINTS . . . . . . . . . .(see Joints and connections) BREECHING

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.0 BRINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1109.9, 1116.5 BROILER UNITS

Open top unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 922.0 BUILDING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204.0 BUILDING AUTOMATION SYSTEMS . . . . . . . . . . . . . .306.2 BUILDING CODE

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.0 BUILDING OFFICIAL

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.0 BUILDING STRUCTURAL MEMBERS . . . . . . 316.9, 902.8 BURNER ASSEMBLIES . . . . . . . . . . . . . . . . . . . . . . . 910.0 BURNER, CONVERSION . . . . . . . . . . . . . . . . . . . . . . 909.1

– C – CARBON MONOXIDE SENSING . . . . . . . . . . . . . . . .403.7.2 CAS NUMBER

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 CENTRAL HEATING PLANT

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 CHIMNEY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .802.5

Cleanouts . . . . . . . . . . . . . . . . . . . .802.5.7.2, 802.5.10 Decorative shrouds . . . . . . . . . . . . .802.5.1.1, 802.5.4.3 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0 Existing . . . . . . . . . . . . . . . . . . . . . . . .802.5.7, 802.5.7.3 Factory-built . . . . . . . . . . . . . . . . . . . . . . . . . . .802.5.1

INDEX

Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .802.5.4.2 Masonry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .802.5.3 Metal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .802.5.2 Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .802.5.5 Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .802.5.9 Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . .802.5.4 CHIMNEY CLASSIFICATIONS

High-heat appliances-type . . . . . . . . . . . . . . . . . . 205.0 Low-heat appliances-type. . . . . . . . . . . . . . . . . . . 205.0 Medium-heat

appliances-type. . . . . . . . . . . . . . . . . . . . . . . . . 205.0 Residential appliances-type . . . . . . . . . . . . . . . . . . 205.0 CHLORINATED POLYVINYL

CHLORIDE (CPVC) PIPE OR TUBING

Ground source loop. . . . . . . . . . . . . . . . . Table F 104.2,

Table F 104.3 Hydronics . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1 Joining

and connections . . . . . . (see Joints and connections) CIRCULATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1208.0 CLASSIFICATION OF

Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403.9 Chimney, definition . . . . . . . . . . . . . . . . . . . . . . . . 205.0 Occupancy, definition. . . . . . . . . . . . . . . . . . . . . . . 217.0 Product-conveying ducts. . . . . . . . . . . . . . . . . . . . 505.8 Refrigerants. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1103.1 Refrigeration systems . . . . . . . . . . . . . . . . . . . . . 1103.2 CLEARANCES FOR

Air-conditioning appliances,

gas type . . . . . . . . . . . . . . . . . 903.2.3, Table 904.2.2 Air heaters . . . . . . . . . . . . . . . . . . . . . . . . . 914.4, 915.4 Appliances . . . . . . . . . . . . . . . . 303.3, 303.8.4, 303.10,

303.10.1, 304.1, 304.3.1.1, 516.2.1, 701.6.2, Table 303.10.1 Boilers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.2, 904.2,

1010.0, Table 904.2.2 Broilers units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 922.3 Clothes dryers, gas type . . . . . . . . . . . . . . . . . . 908.2.1 Connectors. . . . . . . . . . . . . . . 802.10.4, Table 303.10.1,

Table 802.7.3.3 Cooking appliances . . . . . . . . . . . . . . 920.3.1, 920.3.2,

920.4.2, 920.4.3, 923.2 Decorative appliances. . . . . . . . . . . . . . . . . . . . . . 923.2 Draft hoods and controls . . . . . . . . . . . . . . . . . 802.12.6 Ducts, clothes dryer . . . . . . . . . . . . . . . . . . . . 504.4.3.1 Ducts, commercial kitchen

exhaust . . . . . . . . . . . . . . .303.10.1.1, 507.4, 507.4.1,

507.4.6.3, 510.7.3, 510.9.1, 510.9.2 Ducts, furnaces. . . . . . . . . . . . . . . . . . . . . . . . . . . 905.1 Ducts, product conveying,

exhaust . . . . . . . . . . . . . . . . . . . . . 303.10.1.2, 506.10 Equipment on roofs . . . . . . . . . . . . . . . . 303.8, 303.8.4,

303.8.4.1, 304.2, 304.3.1.1 Fans, commercial

kitchen exhaust . . . . . . . . . . . . . . . . . . . . . . . . 510.7.3

2022 CALIFORNIA MECHANICAL CODE 519

INDEX

Floor furnace. . . . . . . . . . . . . . . . . . . . . . . 906.7, 906.11 Food service appliances . . . . . . . . 918.1, 918.2, 919.1,

919.2, 919.3 Furnaces, central heating . . . . . . . . . . 904.2, 904.3.1.2,

Table 904.2.2 Gas-fired toilets. . . . . . . . . . . . . . . . . . . . . . . . . . . 929.1 Gas fireplaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . 912.2 Grease removal devices,

commercial kitchen exhaust. . . . . . . . . . . 507.4, 507.4.1 Hoods . . . . . . . . . . . 506.10.2, 507.4, 507.4.1, 507.4.2.3,

507.4.2.1, 507.4.2.3, 603.13.6 Illuminating appliances . . . . . . . . . . . . . . . 924.1, 924.2,

924.2.1, Table 924.2.1 Infrared heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . 926.2 Kilns . . . . . . . . . . . . . . . . . . . . . . . . . . 603.13.6, 931.5.1 Piping, fuel gas . . . . . . . . . . . . . . . . . . . . . . . . . D 110.1 Piping, hydronics . . . . . . . . . . . . . . . . . . . . . . . . . 1221.6 Pool heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 927.2 Prohibited use . . . . . . . . . . . . . . . . . . . . . . 512.1, 701.12 Reduction of . . . . . . . . . . . . 506.11, 506.10.4, 506.11.6,

507.4.2, 507.4.2.1, 507.4.2.3, 507.4.3.3 Refrigerators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 928.1 Room heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . 916.2.3 Seepage pans. . . . . . . . . . . . . . . . . . . . . . . . . . . . 906.9 Unit heaters . . . . . . . . . . . . . . . . . . . . . . . 917.2, 917.2.1 Unlisted appliances . . . . . . . . . . . . . . . . . 303.3, 303.10 CLOSED COMBUSTIBLE CONSTRUCTION

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 CLOSET OR ALCOVE INSTALLATIONS

Air conditioners . . . . . . . . . . . . . . . . . . . . . . . . 603.13.4 Central heating

furnaces and boilers. . . . . . . . . . . . . . . . 303.2, 904.1 Clothes dryers . . . . . . . . . . . . . . . . . . . 504.4.1, 908.2.1 CLOTHES DRYER

Clearance . . . . . . . . . . . . . . . . . . . . . 504.4.3.1, 908.2.1 Commercial use. . . . . . . . . . . . . . . . . . . . . . . . . 504.4.3 Common exhaust. . . . . . . . . . . . . . . . . . . . . . . . 504.4.4 Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 Domestic type. . . . . . . . . . . . . . . . . . . . . 504.4, 504.4.2 Electric type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 908.1 Exhaust duct. . . . . . . . . . . . . 504.4, 504.4.2, 504.4.2.1,

504.4.2.2, 504.4.3 For multiple family use . . . . . . . . . . . . . . . . . . . . 908.2.3 For public use . . . . . . . . . . . . . . . . . . . . . . . . . . 908.2.3 Makeup air. . . . . . . . . . . . . . . . . . . . . . . . 504.4.1, 701.3 Shutoff devices. . . . . . . . . . . . . . . . . . . . . . . . . . 908.2.3 Termination . . . . . . . . . . . . . . . . . . . . . . . 502.2.1, 504.4 Transition ducts. . . . . . . . . . . . . . . . . . . . . . . . 504.4.2.2 Type 1 . . . . . . . . . . . . . 205.0, 504.4.1, 504.4.2, 908.2.1 Type 2 . . . . . . . . . . . . . . . . . . 205.0, 504.4.3.1, 908.2.1 Unlisted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 908.2.1 CODE

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101.3

Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101.2 Conflicts between . . . . . . . . . . . . . . . . . . . . . . . . . 102.1 COMBUSTIBLE CONSTRUCTION, CLOSED

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 COMBUSTIBLE CONSTRUCTION, OPEN

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217.0 COMBUSTIBLE MATERIAL

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 COMBUSTIBLE MATERIAL, LIMITED

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 COMBUSTION AIR

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 Duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 701.11, 701.12 General requirements . . . . . . . . . . . . . . . . . . Chapter 7 COMBUSTION AIR FOR

Boilers, low pressure,

installed in closets . . . . . . . . . . . . . . . . . . . . . . . 904.1 Engineered installations. . . . . . . . . . . . . . . . . . . . . 701.8 Fireplaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 912.3 Fossil fuel heating equipment. . . . . . . . . . . . . E 502.6.1 Furnaces, central heating . . . . . . . . . . . . . . 904.1, 907.3 COMBUSTION AIR FROM

Bedroom or bathroom. . . . . . . . . . . . . . . . . . . . . . 902.2 Chimneys and vents . . . . . . . . . . . . . . . . . . . 802.5.11.1 Combination, indoor and outdoor . . . . . . 701.7, G 103.0 Indoors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 701.4 Louvers, grilles and screens . . . . . . . . . . . . . . . . 701.10 Mechanical supply . . . . . . . . . . . . . . . . . . . . . . . . . 701.9 Outdoors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 701.6 Refrigeration machinery rooms . . . . . . . . . . . . . . 1106.5 COMMERCIAL FOOD

HEAT-PROCESSING EQUIPMENT

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 COMPRESSOR

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 Flammable

gas-air mixture. . . . . . . . . . . . . . 1310.14.1, 1310.14.5 Positive displacement . . . . . . . . . . 205.0, 1111.2, 1112.2 Refrigeration system . . . . . . . . . . . . . . . 1105.2, 1105.3,

1105.6, 1111.2, 1112.2 CONCEALED SPACES

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 Fuel gas piping in . . . . . . . . . . . . . . . . . . . . . . . 1310.4.1 Hazardous process piping in . . . . . . . . . . . . . . 1406.2.1 Lighting units in

commercial kitchen hoods . . . . . . . . 512.2.3, 512.2.4 Used as ducts. . . . . . . . . . . . . . . . . . . . . . . . . . . . 602.1 CONDENSATE

Cleanouts for condensate drain . . . . . . . . . . . . . 310.3.1 Control . . . . . . . . . . . . . . . . . . . . . . . . . . 310.2, 1105.10 Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .310.1 From air

conditioning equipment . . . . . . . . 310.1, 310.2, 310.5 From air cooling coils . . . . . . . . . . . . . . . . 310.2, 1105.7 From appliances . . . . . . . . . . . . . . . . . . . . . . . . . . 310.4

520 2022 CALIFORNIA MECHANICAL CODE

From category I and

category III appliances . . . . . . . . . . . 802.8.3, 802.9.1 From category II and

category IV appliances . . . . . . . . . . . . 802.8.3, 802.9 From fuel gas piping . . . . . . . . . . . . . . 1310.8, 1310.8.1 From noncategorized

appliances. . . . . . . . . . . . . . . . . . . . . . 802.8.3, 802.9 From refrigeration coils . . . . . . . . . . . . . . . . . . . . . 904.7 Point of discharge . . . . . . . . . . . . . . . . . . . . . . . . . 310.5 Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310.1.1 Waste pipe sizing . . . . . . . . . . . . . . . 310.3, Table 310.3 CONDENSER

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 CONDENSING APPLIANCE

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 CONDENSING UNIT

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 CONDITIONED SPACE

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 CONFINED SPACE

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 CONFLICTS BETWEEN CODES . . . . . . . . . . . . . . . . 102.1 CONNECTORS

Appliances, category I . . . . . . . . . . . . . . . . . . . . 802.10,

802.10.1–802.10.12.1, Table 802.10.1.3 Appliances, category II, III, and IV . . . . . . . . . . . 802.11 Appliance fuel connector. . . . . . . . . . . . . 203.0, 1312.1,

1312.1.1, 1312.3, 1312.5.2, 1312.5.3 Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . Table 802.7.3.3 Chimney . . . . . . . . . . . . . . . 205.0, 802.5.5, 802.10.1.3,

Table 303.10.1, Table 802.10.1.3 Clearances . . . . . . . . . . Table 303.10.1, Table 802.7.3.3 Flexible connectors. . . . . . . . . . . . . . 1312.5.2, 1312.5.3 Gas vent . . . . . . . . . . 224.0, 802.2, 802.3.3.3, 802.5.5,

802.10–802.10.12.1, 802.11, 803.2–803.2.3, 803.2.11, 803.2.14, 803.2.21–803.2.23, Table 303.10.1, Table 802.7.3.3,

Table 802.10.1.3, Table 803.2.1 Incinerators . . . . . . . . . . . . . . . . . . . . . Table 802.10.1.3 Multiple appliances . . . . . . . . . . . . . . . . . . . . . . . . 803.2 Vibration Isolation . . . . . . . . . . . . . . . . . . . . . . 510.9.1.1 CONSTRUCTION DOCUMENTS

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 For Permits . . . . . . . . . . . . . . . . . . . . . . . 103.3, 104.3.1 CONTAINERS FOR

Grease . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 509.2.4.1 Liquid petroleum gas (LP-Gas) . . . . . . . . . . . . . D 104.3 Oil tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D 113.6.2 Refrigerants . . . . . . . . . . (see Refrigerants, containers) CONTINUOUS ENCLOSURE . . . . . . . . . . . . . . 205.0, 510.7

INDEX

COOLING

Air system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311.0 Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 904.7 Evaporative cooling system . . . . . . . . . . . . 207.0, 933.0 System, definition . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 Towers . . . . . . . . . . . . . . . . . . . . . . . Chapter 11 (Part II) Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0, 904.8 COPPER OR COPPER

ALLOY PIPE AND TUBING . . . . . . . . . . . . . . . . . . . 1211.3 CORRUGATED STAINLESS STEEL

TUBING (CSST)

Bonding of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1311.2 Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1310.3.5 Test pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1313.3 CREMATORIES

Factory built . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 926.2 CROSS-LINKED POLYETHYLENE (PEX)

PIPING OR TUBING

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Ground source loop. . . . . . Table F 104.2, Table F 104.3 Hydronics . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1,

Table 1220.4.1 Joining and connections. . . . . . . . . . . . . . . . (see Joints

and connections) Oxygen diffusion . . . . . . . . . . . . . . . . . . . . . . . . . 1210.4 CROSS-LINKED POLYETHYLENE-ALUMINUM-CROSS- LINKED POLYETHYLENE (PEX-AL-PEX) PIPING OR TUBING

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Hydronics . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1 Joining and connections. . . . . . . . . . . . . . . . (see Joints

and connections)

– D – DAMPERS

Automatically

operated. . . . . . . . . . . . . 802.15, 802.15.1, E 502.10.2 Backdraft. . . . . . . . . . . . . . . . . . . 504.1.1, 504.4, 1106.7 Balancing. . . . . . . . . . . . . . . . . . . . . . . . . . . . .E 502.3.1 Ceiling radiation . . . . . . . . . . . . . . . . . . . . . 206.0, 606.3 Chimney, free opening area . . . . . . . . . . . . . Table 911.2 Combination fire and smoke . . . . . . . . . . . . . . . . . 206.0 Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.0 Economizers . . . . . . . . . . . . . . . . . . . . . . . . E 503.5.1.1 Fire . . . . . . . . . . . . . . . . . 206.0, 508.3.5.3, 508.3.5.3.1,

511.4.2, 516.2.6, 606.2, 606.5, 933.1 Fire and smoke, access to . . . . . . . . . . . . . . . . . . 606.5 Freedom from interference . . . . . . . . . . . . . . . . . . 606.6 Heating, ventilation,

and air conditioning . . . . . . . . . . . . . . . . . . . E 502.12 HVAC system tests of . . . . . . . . . . . . . . . . . . . . E 805.0 Identification of . . . . . . . . . . . . . . . . . . . . . . . . . . . 606.5 In ducts, commercial

2022 CALIFORNIA MECHANICAL CODE 521

INDEX

kitchen exhaust . . . . . . . . . . . . . . . . . . 512.1, 512.1.1 In duct furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . 905.6 Manually operated . . . . . . . . . . . . . . 802.13, E 502.10.2 Maximum leakage . . . . . . . . . . . . . . . . . . E 503.4.6.4.2 Motorized, nonrecirculating

air heating. . . . . . . . . . . . . . . . . . 914.7, E 503.4.6.4.1 Multiple arrangements . . . . . . . . . . . . . . . . . . . . . 606.4 Return air . . . . . . . . . . . . . . . . E 503.5.1.3, E 805.5.1.2,

E 805.5.2, E 805.12.1.1 Smoke. . . . . . . . . . . . . . . . . . . . . . . 206.0, 606.1, 606.5 Supply air . . . . . . . . . . . . . E 503.4.6.4.1, E 503.4.6.4.2 Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1003.4 Vent . . . . . . . . . . . . . 802.13, 802.15, 802.15.1, C 109.1 Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.0 DECORATIVE

APPLIANCES, VENTED . . . . . . . . . . . . (see Appliances) DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 2 DEPARTMENT

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.0 DESIGN

Requirements for Ethylene Oxide (ETO)

Sterilization areas . . . . . . . . . . . . . . . . . . . . . 418.0 DESIGN FLOOD ELEVATION . . . . . . . . . . . . . . . . . . . 206.0 DEVICES

Automatic carbon monoxide . . . . . . . . . . . . . . . . 403.7.2 Automatic control . . . . . . . . . . . . . . . . . . . . . . . . . 306.0 Detection. . . . . . . . . . . . . . . . . . . . . . . . . 206.0, 514.2.3 Draft control, fuel gas vent . . . . . . . . . . . . . . . . 802.12.2 Grease removal . . . . . . . . . . . . . . 209.0, 507.4, 507.4.1,

509.0, 513.1.2, 514.4.2, 517.5, 517.7.1 Pressure limiting . . . . . . . . . . 218.0, 904.4, 927.3, 1111.0 Pressure relief . . . . . . . . . . . . . . . . 218.0, 904.6, 1112.0,

1113.0, 1115.4, 1206.1 Quick-disconnect . . . . . . . . . . . 219.0, 1312.3.2, 1312.7 DISTRICT HEATING PLANT

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.0 DRAFT CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . 802.12 DRAFT HOODS . . . . . . . . . . . . . . . . 206.0, 802.5.5, 802.6.2 DRAINAGE

Boiler rooms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1001.4 Cooling tower . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1121.0 Hydronic piping system . . . . . . . . . . . . . . . . . . . . 1221.4 DRAINAGE PANS . . . . . . . . . . . . . . . . 305.5, 310.2, 1105.7 DUCTLESS MINI-SPLIT SYSTEMS . . . . . . . . . . . . . . 935.0 DUCT(S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 6

Air Dispersion . . . . . . . . . . . . . . . . . . . . 602.4.3, 603.12 Clothes dryers. . . . . . . . . . . . . . . . . . . . . 504.4, 504.4.2 Combustion air . . . . . . . . . . . . . . 701.6.1, 701.11, 701.12 Combustibles within . . . . . . . . . . . . . . . . . . . . . . . 602.2 Construction of

(product conveying). . . . . . . . . . . . . . . . . . . . . . 506.2 Cross contamination . . . . . . . . . . . . . . . . . . . . . . 603.10 Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.0 Domestic range vents . . . . . . . . . . . . . . . . . . . . . . 504.3

Duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409.0 Environmental air . . . . . . . . . . . . . . . . . . . . 207.0, 504.0 Exhaust, commercial kitchen . . . . . . . . . . . . . . . . 510.0 Existing metal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.2 Factory-made air. . . . . . . . . . . . . 603.4, 603.4.1, 603.7 Fire protection required . . . . . . . . . . . . . . . . . . . . . 506.8 Flexible air ducts and connectors . . . . . . 603.4, 603.7.2 For kilns . . . . . . . . . . . . . . . . . . 603.13.6, 931.5.3, 931.6 Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.0, 905.0 Gravity ventilation. . . . . . . . . . . . . . . . . . . . . . . . 931.5.3 Grease type . . . . . . . . . . . . . . . . . . . . . . . . 209.0, 510.0 Gypsum wallboard . . . . . . . . . . . . . . . . . 504.6, 602.4.2 In under floor or crawl spaces. . . . . . . . . . . . . . . . 603.2 Inspection and cleaning of . . . . . . . . . . . 514.2, 514.4.2 Insulation of . . . . . . . . . . . . . . . . . . . . 605.0, E 502.4.1,

E 503.4.7.1, Table E 503.7.2–Table E 503.7.3(2) Joints and seams . . . . . . . . . . . . . . . . . . . . . . . . . 603.9 Leakage test . . . . . . . . . . . . . . . . . . . . . . . . . . . 603.9.2 Manifold (common duct) . . . . . . . . . . . . . . . . . . . . 511.4 Material of . . . . . . . . . . . . . . . . . . 506.1, 510.5.1, 602.0 Metal . . . . . . . . . . . . . . . . . 506.1, 602.3, 603.3, 603.7.1 Non-grease type. . . . . . . . . . . . . . . . . . . . . 519.4, 519.5 Nonmetallic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 602.4 Openings. . . . . . . . . . . . . . . . 510.3, 510.3.3–510.3.3.2,

510.3.4.2, 511.1.5 Other grease . . . . . . . . . . . . . . . . . . . . . . 510.5, 602.4.4 Plastic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 603.5 Product-conveying . . . . . . . . . . . . . . . . . 218.0, 502.2.2,

506.0, Table 506.2(1), Table 506.2(2) Protection of. . . . . . . . . . . . . . . . . . . . . . . . 506.9, 603.6 Solid-fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 517.0 Support systems . . . . . . . . . . .504.4.5, 506.7–506.8.4,

510.1.6, 510.1.7, 510.3.3.3, 510.5.1, 603.3–603.3.1, 603.7 Termination . . . . . . . . . . . . . . . . . . 222.0, 502.2, 510.9,

519.5, 701.11 Underground. . . . . . . . . . . . . . . . . . . . . . . 510.8, 603.11

        - **E –**

ECONOMIZERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407.6 ECONOMIZER, AIR . . . . . . . . . . . . . E 503.5.1, E 503.5.1.2,

Table E 503.5.1.2 ECONOMIZER, WATER . . . . . . . . . . E 503.5.2, E 503.5.2.1,

Table E 503.5.2 ELECTRIC HEATING APPLIANCES

Air conditioners . . . . . . . . . . . . . . . . . . . . . . . . . . . 903.1 Duct heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 905.8 Room heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 916.1 ELECTRICAL CODE

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207.0 ENCLOSED PARKING GARAGES . . . . . . . . . . . . . . . 403.7.2 ENCLOSURE OF DUCTS,

COMMERCIAL KITCHEN EXHAUST

Clearances . . . . . . . . . . . . . . 507.4.6.3, 507.4.8, 510.7.3

522 2022 CALIFORNIA MECHANICAL CODE

Continuous. . . . . . . . . . . . . . . . . . . . . . . . . 205.0, 510.7 Ducts within . . . . . . . . . . . . . . . . . . . . . . . . . . . . 510.7.8 Fire doors required . . . . . . . . . . . . . . . . . . . . . . . 510.7.7 Grease, factory built . . . . . . . . . . . . . . . . 208.0, 507.4.4,

507.4.6, 507.4.6.3 Grease duct, field-applied. . . . . . . . . . . . 208.0, 507.4.5,

507.4.6, 507.4.6.3 Product conveying ducts . . . . . . . . . . . . . . . . . . . . 505.8 ENCLOSURES

For equipment on roof. . . . . . . . . . . . . . . . . . . . . . 303.8 For boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1001.2 ENERGY STAR, DEFINITION . . . . . . . . . . . . . . . . . . E 201.3 ENFORCEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.11.2.1 ENFORCING AGENCY . . . . . . . . . . . . . . . . . . . . 1.11.2, 207.0 ENGINE, GAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1602.0 EQUIPMENT

Clearances . . . . . . . . . . . . . . . . . . . . . 303.10, 303.10.1,

Table 303.10.1 Converted equipment . . . . . . . . . . . . . . . . . . . . . . 902.3 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207.0 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301.3 Identification of . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.6 Improper location . . . . . . . . . . . . . . . . . . . . . . . . . 308.0 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.2 On roofs . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.8, 304.0 Protection against flood damage. . . . . . . . . . . . . . 305.3 Service and access. . . . . . . . . . . . . . . . . . . . . . . . 304.0 ETO STERILIZATION AREAS . . . . . . . . . . . . . . . . . . . . 418.0 EVAPORATIVE

Condenser . . . . . . . . . . . . . . . . . 1119.1, 1120.1, 1123.1 Cooler. . . . . . . . . . . . . . . . . . . . . . 207.0, 933.3, E 403.2 Cooler, portable, definition . . . . . . . . . . . . . . . . . . 218.0 Cooling system . . . . . . . . . . . . . . . . . . . . . . 207.0, 933.0 EVAPORATOR

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207.0 EXCESS FLOW VALVE . . . . . . . . . . . . . . . . . . . . . . . . 207.0,

1309.0, 1406.2.1.5 EXHAUST

Bathroom exhaust fans . . . . . . . . . . . . . . . . . . . . . 405.3 Clothes dryer . . . . . . . . . . . . . . 504.4, 504.4.2–504.4.5 Commercial kitchen. . . . . . . . . . . . . . Chapter 5 (Part II) Discharge, type I

and type II system. . . . . . . . . . . . . . . . . . 519.5, 510.9 Ducts . . . . . . . . . . . . . . . . . . . . . . . 504.0, 506.0, 510.0,

Chapter 6, 1106.9 Independent system . . . . . . . . . . . . . . . . 504.2, 517.3.1 Kitchen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 405.4 Mechanical . . . . . . . . . . . . . . . . . . . 405.3, 405.4, 403.7,

Chapter 5, 1105.5.2,

1106.0, Table 403.7 Product conveying. . . . . . . . . . . . . . 218.0, 505.0, 506.0 Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . 403.7.1, 405.3.1,

405.4.1, E 503.5.11.2.1, E 503.5.11.3,Table 403.7 Refrigeration

machinery room . . . . . . . . . . . . . . . . 1105.5.2, 1106.0

INDEX

Separation from

other exhaust . . . . . . . . . . . . . . . . . . . . 504.2, 517.3.1 Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 502.0 Ventilator openings . . . . . . . . . . . . . . . . . . 311.3, 402.4,

402.4.1, 502.1, 1106.7 EXISTING BUILDINGS . . . . . . . . . . . . . . . . . . . . . . . 302.1.3 EXISTING MECHANICAL SYSTEMS . . . . . . . . . . . . . 102.2 EXPANSION TANKS

Closed-type . . . . . . . . . . . . . . . . . . . . . . 1004.3, 1209.4 Minimum capacity . . . . . . . . . . 1004.4, Table 1004.4(1),

Table 1004.4(2) Open-type . . . . . . . . . . . . . . . . . . . . . . . 1004.2, 1209.3 Where required. . . . . . . . . . . . . . . . . . . . 1004.1, 1209.1

– F – FAMILY

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208.0 FANS . . . . . . . . . . . . . . . . . . . . . . . . . 503.0, 510.9.1.2, 511.0 FEES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.5

For investigations . . . . . . . . . . . . . . . . . . . . . . . . 104.5.1 For permits . . . . . . . . . . . . . . . . . . . . 104.5, Table 104.5 For plan review. . . . . . . . . . . . . . . . . . . . . . . . . . 104.3.2 For re-inspection . . . . . . . . . . . . . . . . . . . . . . . . 105.2.6 Mechanical permit fees . . . . . . . . . . . . . . . . Table 104.5 Refunds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.5.3 FILTERS

Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311.0, 602.2 Grease . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209.0, 509.1 In recirculating systems. . . . . . . . . . . . . . . . . . . . . 516.3 Return air . . . . . . . . . . . . . . . . . . . . . E 603.1.1, E 603.3 FIRE

Code, definition. . . . . . . . . . . . . . . . . . . . . . . . . . . 208.0 Damper . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.0, 606.0 Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 510.7.7 Extinguishing equipment . . . . . . . . 513.0, 513.12, 517.7 Fire-resistive

construction, definition . . . . . . . . . . . . . . . . . . . 208.0 Partition, definition . . . . . . . . . . . . . . . . . . . . . . . . 208.0 Resistance rating, definition . . . . . . . . . . . . . . . . . 208.0 Wall, definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . 208.0 FIREPLACE

Decorative appliance for . . . . . . . . . . . . . . . . . . . .911.0 Factory-built . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .913.0 Gas vents . . . . . . . . . . . . . . . . . . . . . . . .912.0, E 602.1 Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .911.3 Stove, definition . . . . . . . . . . . . . . . . . . . . . . . . . . .208.0 Venting . . . . . . . . . . . . . . . . . . . . . . .802.0, 911.2, 912.0 Wood burning . . . . . . . . . . . . . . . . . . . . . . . . . .E 602.1 FITTINGS

Fuel gas piping . . . . . . . . . . . . . . . 1308.5.4, 1308.5.8,

1308.5.7.4, 1310.4.1 Fuel gas vent . . . . . . . . . . . . . . . . . . . .803.2.8, 803.2.9 Hydronic piping . . . . . . . . . . . . . . .1210.0, Table 1210.1 Refrigeration piping . . . . . . . . . . . . . .1109.1.1, 1109.1.2

2022 CALIFORNIA MECHANICAL CODE 523

INDEX

FLAMMABLE VAPORS

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .902.9 FLOOD RESISTANT CONSTRUCTION

Coastal high hazard area . . . . . . . . . . . .205.0, 305.3.1 Design flood elevation . . . . . . . . . . . . . . . . . . . . . .206.0 Flood hazard area . . . . . . . . . . . . . . . . . . . . . . . . .208.0 Flood hazard resistance . . . . . . . . . . . . . . . . . . . .305.3 FLOOR FURNACE . . . . . . . . .(see Furnaces, floor furnace) FUEL

Appliance . . . . . . . . . . . . . . . . . . . . . .(see Appliances) Appliance, connectors, definition . . . . . . . . . . . . .203.0 Shutoff . . . . . . . . . . . . . . . . . . . . .513.4, 513.8, C 102.0,

Table 1003.2.1 Solid-fuel cooking . . . . . . . . . . . . .221.0, 508.6, 510.10,

511.1, 511.5, 513.12, 517.0 Temporary connection . . . . . . . . . . . . . . . . . . . . . .105.4 FUEL APPLIANCE CONNECTOR

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 FUEL GAS

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208.0 FUEL GAS MIXING

BLOWERS AND MACHINES . . . . . . . . . . . . . . 1310.14.3,

1310.14.4, 1310.14.5 FUEL GAS PIPING

Cathodic protection . . . . . . . . . . . . . . . . . . . . . . D 105.0 Change in direction . . . . . . . . . . . . . . . . . . . . . 1310.8.3 Concealed location . . . . . . . . . . . . . . . . . . . . . . . 1310.3 Detection of leaks . . . . . . . . . . . . . . . . . . . . . . . . 1313.4 Electrical bonding and grounding. . . . . . . . . . . . . 1311.0 Inspection and testing . . . . . . . . . . . . . . 1303.0, 1313.0 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1310.0 Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . 1308.3 Joints and fittings . . . . . . . . . . . . . . 1308.5.4–1308.5.8,

1313.2.1, 1313.2.2 Materials. . . . . . . . . . . . . . . . . . . . . . . . 1308.5, D 109.0 Obstruction of flow. . . . . . . . . . . . . . . . . . . . . . . 1310.12 Purging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1313.6 Sizing . . . . . . . . . . . . . 1308.4, 1314.0, 1315.0, D 108.0,

Table 1315.2(1)–Table 1315.2(36) Supports. . . . . . . . . . . . . . . . 1310.3.5, Table 1310.3.5.1 Underground

installations . . . . . . . . 1308.5.2.3, 1308.5.3.4, 1310.0,

D 101.2, D 109.3, D 110.3 Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1308.7.4 FUEL GAS TUBING

Cathodic protection . . . . . . . . . . . . . . . . . . . . . . D 105.0 Change in direction . . . . . . . . . . . . . . . . . . . . . 1310.8.3 Concealed location . . . . . . . . . . . . . . . . . . . . . . . 1310.4 Detection of leaks . . . . . . . . . . . . . . . . . . . . . . . . 1313.4 Electrical bonding and grounding. . . . . . . . . . . . . 1311.0 Inspection and testing . . . . . . . . . . . . . . 1303.0, 1313.0 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1310.0 Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . 1308.3 Joints and fittings . . . . . . . . . . . . . . 1308.5.4–1308.5.8,

1313.2.1, 1313.2.2

Materials. . . . . . . . . . . . . . . . . . . . . . . . 1308.5, D 109.0 Obstruction of flow. . . . . . . . . . . . . . . . . . . . . . . 1310.12 Purging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1313.6 Sizing . . . . . . . . . . . . . 1308.4, 1314.1, 1315.0, D 108.0,

Table 1315.2(1)–Table 1315.2(36) Supports. . . . . . . . . . . . . . . . 1310.3.5, Table 1310.3.5.1 Underground installations . . . . . . . . . . . . . . 1308.5.2.3,

1308.5.3.4, 1310.1, D 101.2, D 109.3, D 110.3 Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1308.7.4 FURNACES

Approximate gas input . . . . . . . . . . . . . . Table 1308.4.1 Automatic control required . . . . . . . . . . . . . . . . . . 608.6 Central heating furnaces . . . . . . . . . . . . . . 303.2, 904.0 Clearance for servicing . . . . . . . . . . . . . . . . . . . 304.4.3,

905.8.2, 906.11 Clearances . . . . . . . . . . . . . . . 303.10, 303.10.1, 904.2,

904.3.1.2, 905.1, 906.7, Table 303.10.1, Table 904.2.2 Downflow-type,

heating, definition . . . . . . . . . . . . . . . . . . . . . . .208.0 Duct furnace . . . . . . . . . . . . . . . . . . . . . . .206.0, 905.0 Enclosed furnace, definition . . . . . . . . . . . . . . . . .208.0 Floor furnace . . . . . . . . . . . . . . . . . . . . . . .208.0, 906.0 Forced-air heating, definition . . . . . . . . . . . . . . . . .208.0 Furnace plenums . . . . . . . . . . .802.3.5, 903.2.3, 904.7 Gravity-type, floor

furnace, definition . . . . . . . . . . . . . . . . . . . . . . . 209.0 Horizontal-type furnace . . . . . . . . . . . . . . . 208.0, 904.9 Oil-fired central furnace. . . . . . . . . . . . . . . . . . . . 904.11 Seepage pan, floor furnace . . . . . . . . . . . . . . . . . 906.9 Solid fuel furnace . . . . . . . . . . . . . . . . . . . . . . . . 904.10 Upflow-type, heating . . . . . . . . . . . . . . . . . 208.0, 904.9 Wall furnace, vented. . . . . . . . 224.0, 907.0, Table 802.4 Warm air . . . . . . . . . . . . . . 225.0, 608.6, 608.7, C 105.1 FUSIBLE LINK

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208.0 FUSIBLE PLUG

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208.0

– G – GALVANIZED STEEL

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209.0 GAS CONVENIENCE OUTLET . . . . . . . . . . . . . . . . . 1312.8 GAS ENGINE, STATIONARY . . . . . . . . . . . . . . . . . . 1602.0 GAS ENGINES,

AIR CONDITIONERS . . . . . . . . . . . . . . . . . . . . . . 903.2.2 GAS VENT CONNECTOR . . . . . . . . . . . . . (see Connectors,

gas vent) GAS VENT,

SURROUNDING SPACE . . . . . . . . . . . . . . . . . . . 802.5.11 GAS-FIRED

Air conditioners

and heat pumps . . . . . . . . . . . . . . . . . . . . . . . . 903.2 Clothes dryers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 908.2 Household cooking appliances. . . . . . . . . . . . . . . 920.2

524 2022 CALIFORNIA MECHANICAL CODE

Industrial air heaters. . . . . . . . . . . . . . . . . . 914.0, 915.0 Room heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 916.2 Toilets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 929.0 GAS FIREPLACE, VENTED . . . . . . . . . . . . . . . . . . . . 912.0 GASEOUS HYDROGEN SYSTEMS . . . . . . . . . . . . . . 937.0 GAUGES, STEAM BOILERS . . . . . . . . . . . . . . . . . . 1003.3 GENERATORS

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209.0 Engine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1602.0 Steam . . . . . . . . . . . . . . . . . . . . . . . . . . . . 918.1, 1011.0 GEOTHERMAL ENERGY SYSTEMS . . . . . . . . Appendix F

Closed-loop systems . . . . . . . . . . . Appendix F (Part II) Decommissioning and abandonment. . . . . . . . . F 110.0 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F 102.0 Design of systems . . . . . . . . . . . . . . . . . . . . . . . F 104.0 Direct exchange systems. . . . . . . . Appendix F (Part IV) Groundwater systems . . . . . . . . . . . . . . . . . . . . F 103.0 Heat pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . F 105.0 Installation practices . . . . . . . . . . . . . . . . . . . . . F 108.0 Open-loop systems . . . . . . . . . . . . Appendix F (Part III) Specific system components design. . . . . . . . . . F 107.0 System start-up . . . . . . . . . . . . . . . . . . . . . . . . . F 109.0 Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F 106.0 GRAVITY

Definition, heating system. . . . . . . . . . . . . . . . . . . 209.0 Type floor furnace. . . . . . . . 209.0, 306.1, Table 904.2.2 Venting system . . . . . . . . . . . . . . . 224.0, 931.5.3, 931.6 GREASE

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209.0 Ducts . . . . . . . . . . . . . . . . . . . . . 209.0, 510.1.3, 510.1.7 Ducts, four stories or more . . . . . . . . . . . . . . . . . 517.4.2 Drip trays. . . . . . . . . . . . . . . . . . . . . . 509.2.4, 509.2.4.1 Filter mesh type, definition . . . . . . . . . . . . . . . . . . 209.0 Filters . . . . . . . . . . . . . . . . . . . . . 209.0, 509.1, 509.2.3,

509.2.4, 509.2.5, 516.3.2 Laden vapors. . . . . . . . . . . . . . . . 507.2, 508.3.1, 508.5,

511.2.2, 511.4.6, 513.1.2, 516.1 Receptacle. . . . . . . . . . . . . . . . . . . . 511.1.2.1, 511.1.3.1,

511.1.3.2 Removal devices . . . . . . . . . . . . . . 209.0, 507.4, 509.0,

513.1, 513.2.5, 516.1, 517.5 Vapors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 508.3.1 GRILLES AND LOUVERS . . . . . . . . . . . . . . . . . . . . . 701.10 GROUNDING ELECTRODE . . . . . . . . . . . . . . 209.0, 1311.0

– H – HANGERS AND SUPPORTS

Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .303.4 Ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . .506.7, 510.1.6,

510.1.7, 603.3 Fuel gas piping . . . . . . . . . . . . . . . . . . .313.7, 1310.3.5,

Table 1310.3.5.1 Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . .917.1, 926.1 Hydronics system piping . . . . . . . . . . . . . . . . . . .1210.3

INDEX

In ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .313.5 Piping and tubing . . . . . . . . . . . . . . .313.0, Table 313.3 Refrigeration equipment . . . . . . . . . . . . . . . . . . .1105.2 HEALTH FACILITIES . . . . . . . . . . . . . . . . . . . . . . . . . . 1602.0

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210.0 HEAT (ENERGY)

RECOVERY VENTILATORS . . . . . . . . . . . . . . . . . . 504.5 HEAT PUMPS

Auxiliary Heat Control . . . . . . . . . . . . . . . . . E 503.4.6.6 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210.0 Hydronic (water loop) . . . . . . E 503.5.5.2.3, E 503.5.7.4 In low-rise buildings . . . . . . . . . . . . . E 502.0, E 502.7.2 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 903.2 Labeling . . . . . . . . . . . . . . . . . . . . . . 307.3, E 503.4.4.1 Minimum efficiency . . . . . . . . . . . . . . . . . Table E 502.9,

Table E 503.7.1(2),

Table E 503.7.1(4) Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307.3 Other than

low-rise buildings, HVAC. . . . . . . . . . . . . . . E 503.3.1 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E 805.3 HEATER

Air. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 914.0, 915.0 Aircraft hangars. . . . . . . . . . . . . . . . . . . . . . . . . . 303.12 Clearances . . . . . . . . . . . . . . . . . . . . . (see Clearances) Direct gas-fired industrial air. . . . . . . . . . . . 914.0, 915.0 Duct, electric. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306.1 Efficiency . . . . . . . . . . . . . . . . . . . . . . Table E 503.7.1(5) Infrared . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 926.2 Pool. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 929.0 Radiant room, definition . . . . . . . . . . . . . . . . . . . . 220.0 Room . . . . . . . . . . . . . . . . . . . . . . 220.0, 802.2.1, 916.0 Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223.0, 917.0 Wall. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225.0 Water. . . . . . . . . . . . . . . . . . . . . 225.0, 802.2.1, 1203.2,

1203.3, Table 1203.2 HEATING

Air system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311.0 Appliances. . . . . . . . . . . . . . . (see Appliances, heating) Equipment, industrial,

definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211.0 Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209.0 Plant, central, definition. . . . . . . . . . . . . . . . . . . . . 205.0 Plant, district, definition. . . . . . . . . . . . . . . . . . . . . 206.0 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210.0, 311.0 HEATING DEGREE DAY

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210.0 HIGH-RISE BUILDINGS

Existing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.11.3.4 Fees. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.11.4 New Construction. . . . . . . . . . . . . . . . . . . . . . . . 1.11.3.3 HOODS

Airflow rate. . . . . . . . . . . . . . . . . . . . . . 508.5, 508.5.2.2 Canopy-type . . . . . . . . . . . . . . . . . . . . . 508.5.1, 931.5.2 Capacity . . . . . . . . . . . . . . . . . . . . . 508.5.1.1, 508.5.2.2

2022 CALIFORNIA MECHANICAL CODE 525

INDEX

Ceiling Technology. . . . . . . . . . . . . . . . . . . . . . . 508.2.2 Clearance . . . . . . . . . . . . . (see Clearances for, hoods) Commercial cooking . . . . . . . . . . . . . . . . . . . . . . . 508.0 Compensating. . . . . . . . . . . . . . . . . . . . . . . 205.0, 511.3 Construction. . . . . . . . . . . . . . . . . 508.3, 519.2, 508.3.2 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210.0 Draft . . . . . . . . . . . . . . . . . . . . . . . 206.0, 802.12, 905.4 Eyebrow-type. . . . . . . . . . . . . . . . . . . . . . . . . . . 508.3.3 Exhaust outlet. . . . . . . . . . . . . . . . . . . . . . . . . . . . 508.7 Fixed baffle . . . . . . . . . . . . . . . . . . . . . . . 210.0, 513.2.5 For dishwashing machines. . . . . . . . . . . . . 519.1, 519.3 For kilns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 931.5.2 Grease removal devices in . . . . . . . . . . . . . . . . . . 509.0 Inspection and cleaning . . . . . . . . . 514.2, 514.3, 514.4 Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 508.3.4 Integrated supply-air plenums . . . . . . . . . . . . . . 508.3.5 Labeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 508.5.3 Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 508.1 Noncanopy-type. . . . . . . . . . . . . . . . . . . . . . . . . 508.5.2 Product conveying . . . . . . . . . . . . . . . . . . . . . . . . 505.11 Seams, joints and penetration . . . . . . . . . . . . . . 508.3.1 Size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 508.5 Solid-fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . 508.6, 517.3 Type I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210.0, 508.3 Type II. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210.0, 519.2 Ultraviolet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 508.2.1 Ventilating . . . . . . . . . . . . . . . . . . . . . . 802.2.1, 802.2.4,

802.3.4, 802.12, 922.3 HOT PLATES . . . . . . . . . . . . . . . . . . . . . . . . . . 919.1–919.3 HYDRONIC SPACE HEATING . . . . . . . . . . . . . . . . . 1215.0 HYDRONICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 12

Auxiliary systems . . . . . . . . . . . . . . . . . . . . . . . . 1220.0 Appliances and equipment . . . . . . . . . . . . . . . . . 1207.0 Boilers . . . . . . . . . . . . . . . . . . 1207.2, 1207.2.1, 1207.2.2 Circulators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1208.0 Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1221.6 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210.0 Embedded piping and joints . . . . . . . . . . . . . . . . 1221.2 Expansion tanks . . . . . . . . . . . . . . . . . . . . . . . . . 1209.0 Hangers and supports. . . . . . . . . . . . . . . . . . . . . 1210.3 Heat sources . . . . . . . . . . . . . . . . . . . . . . . . . . . 1203.1 Heat transfer medium . . . . . . . . . . . . . . . . . . . . . 1215.5 Identification of piping . . . . . . . . . . . . . . . . . . . . . 1204.0 Installation . . . . . . . . . . . . . . . . . . . . . . . 1205.0, 1221.0 Insulation . . . . . . . . . . 1201.2, 1217.5.2, 1217.7, 1220.4.5 Joints and connections . . . . . . . . . . . . . . . . . . . . 1211.0 Materials . . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1 Protection of potable water supply . . . . . . . . . . . 1202.0 Radiant heating and cooling . . . . . . . . . . . . . . . . 1217.0 Snow melt systems . . . . . . . . . . . . . . 1220.4, 1220.4.1,

1217.5.2, Table 1220.4.1 Safety devices. . . . . . . . . . . . . . . . . . . . . . . . . . . 1206.0 Steam systems . . . . . . . . . . . . . . . . . . . . . . . . . . 1216.0 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . 1205.2, 1221.3 Water heaters . . . . . . . . . . . . . . . . . . . . 1203.2, 1203.3,

1207.3, Table 1203.2

– I – IDLH

526 2022 CALIFORNIA MECHANICAL CODE

– J – JOINTS AND CONNECTIONS . . . . . . . . . . . . . . . . . 1109.2,

1109.8, 1211.0, 1308.5.8–1308.5.9.6 Brazed joint . . . . . . . . . . . . . . . . . . . . . . . 212.0, 1211.3 Copper or copper

alloy pipe or tubing . . . . . . . 1109.2, 1211.3, 1211.14.1 CPVC piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1211.2 Embedded piping and joints . . . . . . . . . . . . . . . . 1221.2 Expansion joint. . . . . . . . . . . . . . . . . . . . . . . . . 1313.2.2 Flared. . . . . . . . . . . . . . . . . . . . . . . . . . . . 212.0, 1211.3,

1308.5.7.4, 1308.5.7.5 Mechanical joint . . . . . . . . . . . . . . 212.0, 1109.7, 1211.5,

1211.6, 1211.8, 1211.9, 1211.12, 1211.13, 1308.5.8.3 PE pipe or tubing . . . . . . . . . . . . . . . . . . . . . . . . . 1211.8 PE-AL-PE pipe or tubing . . . . . . . . . . . . . . . . . . . 1211.9 PE-RT piping or tubing. . . . . . . . . . . . . . . . . . . . 1211.10 PEX pipe or tubing. . . . . . . . . . . . . . . . . . . . . . . . 1211.5 PEX-AL-PEX pipe or tubing . . . . . . . . . . . . . . . . . 1211.6 Plastic piping, joints, and fittings . . . . . . . . . . . 1211.14.2 PP piping or tubing. . . . . . . . . . . . . . . . . . . . . . . 1211.11 Press-Connect, definition . . . . . . . . . . . . . . . . . . . 212.0 PVC piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1211.12 Soldered joint . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212.0 Solvent cement

plastic pipe . . . . . . . . . . . . . . . . . . . . . 1211.2, 1211.12 Steel pipe or tubing . . . . . . . . . . . . . . . . 1109.2, 1211.13 Threaded joint . . . . . . . . . . . . . . . . . . . . 1211.2, 1211.13 Various materials . . . . . . . . . . . . . . . . . . . . . . . . 1211.14 Welded joint. . . . . . . . . . . . . . . . . . . . . . . 212.0, 1211.13 JUMPER, BONDING

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.0 Fuel gas piping. . . . . . . . . . . . . . . . . . . . . . . . . . . 1311.2

– K – KILNS, SMALL CERAMICS . . . . . . . . . . . . . . . . . . . . 931.0 KITCHEN HOODS, COMMERCIAL . . . . . . . . . . . . . . 508.0

– L – LABELED

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 LABELS AND INSTRUCTIONS

For appliances. . . . . . . . . . . . . . . . . . . . . . . . . . . . 307.0 For heating appliances . . . . . . . . . . . . . . . . . . . . . 307.0 For hydronic systems . . . . . . . . . . . . . . . . . . . . . 1204.0 For refrigerating systems . . . . . . . . . . . . . . . . . . . 1115.0 For type I hoods. . . . . . . . . . . . . . . . . . . . . . . . . 508.5.3 LABORATORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 410.0 LADDER, PERMANENT . . . . . . . . . . . . . . . . . . . . 304.3.1.2 LEAKS

Fuel gas . . . . . . . . . . . . . . . . . . . . . . . . . 1313.4, 1313.5 LOWER FLAMMABILITY LIMIT (LFL)

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0

INDEX

Product conveying ducts . . . . . . . . . . . . . . 505.1, 505.3 Refrigeration . . . . . . . . . . . . . . . . . . . 1104.4, 1106.2.5.2 LINE CONTACT INSTALLATION

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 LIQUEFIED PETROLEUM GAS (LP-GAS)

Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.7.1 Automatic control devices . . . . . . . . . . . . . . . . . . . 306.0 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 Gas Facilities . . . . . . . . . . . . . . . . 214.0, 303.7, 1312.11 Shutoff devices. . . . . . . . . . . . . . . . . . . . . . . . . . D 110.4 Supply connections . . . . . . . . . . . . . . . D 101.2, D 106.1 LISTED

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 LISTED AND LISTING

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 LISTING AGENCY

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 LOCATION OF

Appliances in garages . . . . . . . . 305.1.1, 305.1.2, 905.7 Appliances subject to

mechanical damage . . . . . . . . . . . . . . . . . . . . 305.1.1 Boilers, central heating . . . . . . . . . . . . . . . . . . . . . 904.1 Draft hoods and controls . . . . . . . . . . . . . 802.12, 905.4 Evaporative cooling systems. . . . . . . . . . . . . . . . . 933.2 Pool heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 927.1 Refrigerating equipment . . . . . . . . . . . . . . . . . . . 1106.1 Wall furnaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 907.2 LOUVERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315.0 LOUVERS, GRILLES,

AND SCREENS . . . . . . . . . . . . . . . . . . . . . . . . . . . 701.10 LOW-PRESSURE

HOT-WATER-HEATING BOILER

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 LOW-PRESSURE STEAM-HEATING BOILER

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 LOW-WATER CUTOFF . . . . . . . . . . . . . . . . . . . . . . . 1008.0

– M – MACHINERY

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215.0 MACHINERY ROOM, REFRIGERATION

Equipment and controls in. . . . . . . . . . . . . . . . . . 1108.0 Detectors and alarms . . . . . . . . . . . . . . . . . . 1106.2.2.1 Ventilation of . . . . . . . . . . . . . . . . . . . 1106.2.3, 1106.2.4 Where required . . . . . . . . . . . . . . . . . . . . . . . . . . 1106.0 MAKEUP AIR . . . . . . . . . . . . . . . . . . . . . . (see Air, Makeup) MARKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302.1.1 MASONRY, CHIMNEYS . . . . . . . . . (see Chimney, masonry) MATERIALS

Alternate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302.2 For construction of

hoods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 508.3 For piping, containers, and valves of

refrigeration systems . . . . . . . . . . . . . . . . . . . . 1109.1 For ducts . . . . . . . . . . . . . . . . . . . 506.1, 510.5.1, 602.0

For fuel piping. . . . . . . . . . . . . . . . . . . . 1308.0, D 109.0

2022 CALIFORNIA MECHANICAL CODE 527

INDEX

For piping, tubing

and fittings hydronics . . . . . . . . . 1210.0, Table 1210.1 For vent connectors. . . . . . . . . . . 802.10.1.1–802.10.1.4 MECHANICAL

Combustion air supply. . . . . . . . . . . . . . . 701.9, E 502.6 Exhaust system. . . . . . . . . . . . . . . . . . . . . . . . . . . 505.1 Ventilating system . . . . . . . . . . . 402.3, 1106.8, E 502.6,

E 605.1.2, Table E 502.6 MECHANICAL EXHAUSTING FOR

Bathrooms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E 605.2 Low-rise residential dwelling . . . . . . . . . . . . . . E 605.1.3 Product conveying. . . . . . . . . . . . . . . . . . . . . . . . . 505.0 Refrigeration . . . . . . . . . . . . . . . . . . . . 1105.5.2, 1106.0 MECHANICAL JOINTS . . . . . . . . . . . . . . . . . . . . (see Joints

and connections) MECHANICAL PERMIT FEE . . . . . . . . . 104.5, Table 104.5 MECHANICAL SYSTEMS

Application to existing . . . . . . . . . . . . . . . . . . . . . . 102.2 In elevator shaft. . . . . . . . . . . . . . . . . . . . . . . . . . . 305.4 METAL

Chimneys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 802.5.2 Ducts. . . . . . . . . . . . . . . . . . . . . . . . 506.1, 602.3, 603.3 METER, GAS . . . . . . . . . . . . . . . . . . . . . . . . 1308.6, D 104.0 METHODS OF CONSTRUCTION,

ALTERNATES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302.2 MINIMUM REQUIREMENTS

Purpose of Code . . . . . . . . . . . . . . . . . . . . . . . . . . 101.3 MINIMUM STANDARDS . . . . . . . . . . . . . . . . . . . . . . . 302.1 MOBILE HOME PARKS

FUEL GAS EQUIPMENT

AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . D 101.1 MOTORS, FANS, AND FILTERS . . . . . . . . . . . . . . . . . 503.0 MULTIPLE-ZONE SYSTEM . . . . . . . . . . . . . . . . . . . . . 404.0

– N – NATURAL VENTILATION

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216.0 Floor area to be ventilated . . . . . . . . . . . . . . . . . 402.2.1 Indoor air quality for

low-rise residential buildings . . . . . . . . . . . . . E 605.1 Indoor air quality for

residential occupancies . . . . . . . . . . . . . . . . . 405.1.1 Location and size openings . . . . . . . . . . . . . . . . 402.2.2 Refrigeration systems . . . . . . . . . . . . . . . . . . . . . 1106.3 Systems . . . . . . . . . . . . . . . . . . . . . . . . . 402.2, 402.2.1 NEONATAL INTENSIVE CARE UNITS

Formula preparation area . . . . . . . . . . . . . . . . . . . 419.1 Treatment Area/Room . . . . . . . . . . . . . . . . . . . . . . 419.2 NONCOMBUSTIBLE MATERIAL

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216.0 NON-GREASE DUCTS . . . . . . . . . . . . . . . . . . . . . . . . 519.4 NUISANCE

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216.0

– O – OCCUPATION CLASSIFICATION

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217.0 ODOROUS ROOMS . . . . . . . . . . . . . . . . . . . . . . . . . . . 413.0 OIL BURNING BOILERS . . . . . . . . . . . . . (see Boiler types,

oil burning) OPEN TOP BROILER UNIT . . . . . . . . . . . . . . . . . . . . 922.0 OPENINGS

Air heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 914.7 Attics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E 502.11 Ducts. . . . . . . . . . . . . . . . . . . . . . . 506.6, 510.1.4, 510.3 Exhaust and intake . . . . . . . . . . . . . . . . . 305.3.2, 926.3 For access . . . . . . . . . . . . . . . . . . . . . . . 506.3, 510.1.4,

514.1.2, 1406.2.1.4 For combustion air. . . . . . . . . . . . . . . . . . 701.6, C 109.1 Furnaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 906.8 Illuminating appliances . . . . . . . . . . . . . . . . . . . . . 924.4 Ratproofing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316.10 Relief. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 914.7 Screens . . . . . . . . . . . . . . . . . . . . . . . . . . 402.4, 802.1.2 Ventilation . . . . . . . . . . . . 402.2.1, 402.2.1.1, 402.2.1.2,

402.2.1.3, 402.2.1.4, 402.2.2, 402.2.3, 802.1.2, 802.10.3, 1105.5.1, 1106.3, E 605.1.1 OUTDOOR AIR INTAKES . . . . . . . . . . . . . . . . . . . . . . . 407.2 OUTDOOR AIR RATE

Calculation. . . . . . . . . . . . . . . . . . . . . . . . . . Appendix H OUTLETS

Appliance flue . . . . . . . . . . . . . 203.0, 802.10.5, 803.1.1 Draft hood . . . . . . . . . . . . 802.10.2.1, 802.10.5, 803.1.1 Exhaust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 508.7 Fuel gas piping . . . . . . . . . . . . 1305.2, 1306.3, 1310.10,

1312.8, 1314.4 OVER PRESSURE PROTECTION

Fuel gas piping . . . . . . . . . . . . . . . . . 1308.7.1, 1310.6.1 OVERHEAD HEATERS

In garages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 926.4

– P – PENALTIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106.2, 106.3 PERMISSIBLE EXPOSURE

LIMIT (PEL)

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 PERMITS

Application. . . . . . . . . . . . . . . . . . . . . . . . . 103.3, 104.3,

302.3.1, 1402.0 Construction documents . . . . . . . . . . . . . . . . . . 104.3.1 Exempt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.2 Expiration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.4.3 Fees . . . . . . . . . . . . . . . . . . . . . . . . . 104.5, Table 104.5 For alteration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105.0 Investigation fees . . . . . . . . . . . . . . . . . . . . . . . . 104.5.2 Issuance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.4 Mechanical systems . . . . . . . . . . . . . . . . . . . . . . . 104.0 Retention of plans . . . . . . . . . . . . . . . . . . . . . . . 104.4.6

528 2022 CALIFORNIA MECHANICAL CODE

Suspension or revocation of. . . . . . . . . . . . . . . . 104.4.5 To operate boiler or

pressure vessel . . . . . . . . . . . . . . . . . . . . . . . . 1013.2 Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.4.2 Work without . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.5.1 PERMITS AND INSPECTIONS . . . . . . . . . . . . 104.0, 105.0,

302.3.1, 302.3.6 PHARMACIES 505.12 PHARMACEUTICAL COMPOUND EXHAUST

DISCHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 507.7 PILOT

Boilers. . . . . . . . . . . . . . 1006.1, 1007.1, C 106.0, C 107.0 Continuous, definition . . . . . . . . . . . . . . . . . . . . . . 205.0 Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Intermittent, definition. . . . . . . . . . . . . . . . . . . . . . . 211.0 Interrupted, definition . . . . . . . . . . . . . . . . . . . . . . . 211.0 PIPING

Fuel gas . . . . . . . . . . . . . . . . . . . . . . . . . 1308.0, 1310.0 Hangers and supports . . . . . . . . . . . . . . . 313.0, 1105.2,

1109.6, 1210.3, 1310.3.5, 1310.3.5.1, Table 313.3, Table 1310.3.5.1 Hydronics . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1 Identification . . . . . . . . . . . . . . . . . . . . . 1109.10, 1204.0 Joints and connections. . . . . . . . . . . . . . . . . (see Joints

and connections) Protection of . . . . . . . . . . . . . . . . . . . . . 316.0, 1109.4.1,

1310.1.3, 1310.1.4 Trenching, excavation,

and backfill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317.0 Underground . . . . . . . . . . . . . 1109.5, 1109.5.1, 1310.1.6 PIPING TYPES

Double-wall . . . . . . . . . . . . . . . . . . . . . Table 803.1.2(1),

Table 803.1.2(2), Table 803.2(1), Table 803.2(2) Single-wall metal . . . . . . . . . . . . 802.7, Table 803.1.2(5) PLANS

Approval by Authority

Having Jurisdiction . . . . . . . . . . . . . . . . . . . . . . . 104.3 Retention of . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.4.6 Review fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.3.2 PLENUMS

Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 601.1 Closure systems . . . . . . . . . . . . . . . . . . . . . . . . . . 603.9 Combustibles within . . . . . . . . . . . . . . . . . . . . . . . 602.2 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Furnace . . . . . . . . . . . . . . . . . 603.13.4, 604.1, 802.3.5,

903.2.3, 904.2 Heating and cooling system . . . . . . . . 605.1, E 503.3.1 Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 516.6.3 Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . E 503.4.7.1.1 Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . E 503.4.7.2.1 Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 602.1 Metal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 602.3 Serving type II hoods . . . . . . . . . . . . . . . . . . . . . 510.1.7

INDEX

Supply-air. . . . . . . . . . . . . . . . . . . . . 508.3.5, 508.3.5.3,

508.3.5.3.3, 608.0, E 503.4.7.1.1 Use of under-floor as supply plenum. . . . . . . . . . . 608.0 Where dampers are required . . . . . . . . . . . . . . . . 701.12 PLUMBING CODE

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 POLYETHYLENE (PE) PIPE OR TUBING

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Fuel gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1308.5.4,

Table 1315.2(19)–Table 1315.2(23),

Table 1315.2(34)–Table 1315.2(36) Hydronics . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1 Joining

and connections . . . . . . . . . . . . . . . . . . . . (see Joints

and connections) POLYETHYLENE-ALUMINUM-POLYETHYLENE (PE-AL-PE) PIPE OR TUBING

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Ground source loop. . . . . . Table F 104.2, Table F 104.3 Hydronics . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1 Joining and connections. . . . . . . . . . . . . . . . (see Joints

and connections) POLYETHYLENE OF RAISED TEMPERATURE (PE-RT) PIPE OR TUBING

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Ground source loop. . . . . . . . . . . . . . . . . Table F 104.2,

Table F 104.3 Hydronics . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1,

Table 1220.4.1 Joining and connections. . . . . . . . . . . . . . . . (see Joints

and connections) Oxygen diffusion . . . . . . . . . . . . . . . . . . . . . . . . . 1210.4 POLYPROPYLENE (PP) PIPE OR TUBING

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Ground source loop. . . . . . . . . . . . . . . . . Table F 104.2,

Table F 104.3 Hydronics . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1 Joining and connections. . . . . . . . . . . . . . . . (see Joints

and connections) POLYVINYL CHLORIDE (PVC) PIPE OR TUBING

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Ground source loop. . . . . . Table F 104.2, Table F 104.3 Hydronics . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1 PORTABLE

Cooling unit . . . . . . . . . . . . . . . . . . . . . . . . 104.2, 218.0 Evaporative cooler . . . . . . . . . . . . . . . . . . . 104.2, 218.0 Fire extinguishers . . . . . . . . . . . . . . . . . . . 513.2, 513.11 Heating appliance . . . . . . . . . . . . . . . . . . . 104.2, 218.0 Ventilating equipment. . . . . . . . . . . . . . . . . 104.2, 218.0 POSITIVE DISPLACEMENT COMPRESSOR

Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1112.2 POWER BOILER PLANT

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0

2022 CALIFORNIA MECHANICAL CODE 529

INDEX

PRESSURE

Design, definition . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Field test, definition . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Imposing element, definition . . . . . . . . . . . . . . . . . 218.0 Limiting devices. . . . . . . . . . . . . . . . . . . . . 218.0, 904.4,

927.3, 1111.0, 1308.10.6 Relief devices . . . . . . . . . . . . . . . . 218.0, 904.6, 1112.0,

1113.0, 1115.4, C 109.1 Tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D 113.6.2 Test, definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Vessel . . . . . . . . . . . . . . . . . . . . . . . .218.0, Chapter 10,

1113.0, 1117.0 Vessel, refrigerant . . . . . . . . . . . . .218.0, 1113.0, 1117.0 PRESSURE-RELIEF VALVE

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224.0 Discharge . . . . . . . . . . 1005.2, 1112.10, 1112.11, 1206.2 Hydronics . . . . . . . . . . . . . . . . . . . . . . . 1206.0, F 106.8 Pressure vessels . . . . . . . . . . . . . . . . . . 1005.0, 1113.0, Refrigeration system. . . . . 1111.2, 1112.0, 1113.0, 1115.4 Steam and hot

water boilers (low pressure) . . . . . . . . . . . . . . . 904.6 PROTECTION

Fire . . . . . . . . . . . . . . . . . . . . .506.8, 507.4.3.1, 510.3.7,

512.3.3, 513.2.1, 516.2.3, 516.5, 1108.1, 1406.2.1.4 Overpressure . . . . . . . . . . . . . . . . . . . .1308.8, 1310.6.1 Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301.6 Piping, materials, and structures . . . . . . . . . . . . . .316.0 PURGE

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0 Fuel gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1313.6 PROTECTIVE ENVIRONMENT ROOMS . . . . . . . . . . . 415.0

– R – RADIANT HEATING AND COOLING . . . . . . . . . . . . .1217.0 RADIANT ROOM HEATER

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220.0 RANGE

Commercial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .921.1 Domestic . . . . . . . . . . . . . . . . . . . . . . . . . .504.3, 920.0 Oil burning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .921.3 Ventilation of . . . . . . . . . . . . . . . . . . . . . . . . . . . . .504.3 RATPROOFING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316.10 RECIRCULATING SYSTEMS

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220.0 Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .516.0 Labeling . . . . . . . . . . . . . . . . . . . . . . . .516.2.4, 516.2.5 Listing . . . . . . . . . . . . . . . . . . .516.2.2, 516.2.5, 516.2.9 Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .403.5 REFRIGERANTS

Ammonia . . . . . . . . . . . . . . . . . .1102.1, 1104.4, 1104.5,

1106.0, 1106.1.4, 1106.5, 1114.1, Table 1102.3, Table E 503.7.1(7) Amount of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1104.2 Applications for human comfort . . . . . . . . . . . . . .1104.6 Azeotrope, definition . . . . . . . . . . . . . . . . . . . . . . .203.0

Changing of . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1104.8 Classification of . . . . . . . . . . . . . . . . . . . . . . . . . .1103.0 Concentration limit . . . . . . . . . . . . . . . . . . . . . . . .1104.2 Containers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1109.0 Emergency purge . . . . . . . . . . . . . . . . . . . . . . . .1106.0 Flammable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1104.5 In institutional occupancies . . . . . . . . . . . . . . . . .1104.3 In nonindustrial occupancies . . . . . . . . . . . . . . . .1104.6 Parts in ducts. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1106.9 Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1109.0 Port protection . . . . . . . . . . . . . . . . . . . . . . . . . . 1105.11 Pressure vessel . . . . . . . . . . . . . . . 218.0, 1113.0, 1117.0 Purity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1104.7 Mixing of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1104.7.4 Reclaimed . . . . . . . . . . . . . . . . . . . . . . . 220.0, 1104.7.3 Recovered . . . . . . . . . . . . . . . . . . . . . . . 220.0, 1104.7.1 Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1101.2 Recycled . . . . . . . . . . . . . . . . . . . . . . . . 220.0, 1104.7.2 Refrigerant designation, definition . . . . . . . . . . . . 220.0 Requirements for . . . . . . . . . . . . . . . . . . . . . . . . . 1104.0 Safety classification, definition . . . . . . . . . . . . . . . 220.0 Storage of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1105.12 Types used. . . . . . . . . . . . . 1102.3, 1104.7, Table 1102.3 Zeotropic, definition. . . . . . . . . . . . . . . . . . . . . . . . 228.0 REFRIGERATION EQUIPMENT

Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1105.3 Coils. . . . . . . . . . . . . . . . . . 310.6, 903.2.5, 904.7, 905.6 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1108.0 Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1115.0 Illumination and

service receptacles . . . . . . . . . . . . . . . . . . . . . 1105.4 Location of . . . . . . . . . . . . . . . . . . . . . . . 1104.2, 1105.0 Refrigeration recovery . . . . . . . . . . . . . . . . . . . . . 1101.2 Supports and anchorage. . . . . . . . . . . . . . . . . . . 1105.2 Testing of . . . . . . . . . . . . . . . . . . . . 1116.0, Table 1116.2 Valves. . . . . . . . . (see Valves, for refrigeration systems) REFRIGERATION

MACHINERY ROOMS . . . . . . . . . . . 220.0, 1106.0, 1115.3 REFRIGERATION SPACES

Concentration limit. . . . . . . 1102.3, 1104.2, Table 1102.3 Industrial occupancies. . . . . . . . . . . . . . . . . . . . . 1104.4 Institutional occupancies . . . . . . . . . . . . . . . . . . . 1104.3 Nonconnecting spaces . . . . . . . . . . . . . . . . . . . 1104.2.2 Refrigerated spaces . . . . . . . . . . . . . . . . . . . . . . 1104.4 Ventilated spaces . . . . . . . . . . . . . . . . . . . . . . . 1104.2.3 Volume calculation . . . . . . . . . . . . . . . . . . . . . . 1104.2.1 REFRIGERATION SYSTEM CLASSIFICATION

104.4 Institutional occupancies . . . . . . . . . . . . . . . . . . . 1104.3 Nonconnecting spaces . . . . . . . . . . . . . . . . . . . 1104.2.2 Refrigerated spaces . . . . . . . . . . . . . . . . . . . . . . 1104.4 Ventilated spaces . . . . . . . . . . . . . . . . . . . . . . . 1104.2.3 Volume calculation . . . . . . . . . . . . . . . . . . . . . . 1104.2.1 REFRIGERATION SYSTEM CLASSIFICATION

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220.0 High-probability systems. . . . . . . . . . . . . . . . . . 1103.2.1 Higher flammability refrigerants. . . . . . . . . . . . . . 1103.3 Low-probability . . . . . . . . . . . . . . . . . . . . . . . . . 1103.2.2 REFRIGERATION SYSTEMS

Absorption . . . . . . . . . . . . . . . . . . . . . . . . . 220.0, 307.4 Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 934.0 Attic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1105.3, 1105.9 Classification of . . . . . . . . . . . . . . . . . . . . . . . . . . 1103.2

530 2022 CALIFORNIA MECHANICAL CODE

Condensation . . . . . . . . . 310.6, 1105.7, 1105.10, 1109.9 Containing

hazardous fluids. . . . . . . . . . . . . . . . . . . . . . . . 1125.0 Defrost. . . . . . . . . . . . . . . . . . . . . . . . . . 1105.8, 1105.10 Discharge piping. . . . . . . . . . . . 1112.10, 1112.11, 1114.1 Duct furnaces used with . . . . . . . . . . . . . . . . . . . . 905.6 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1108.2 Emergency shut-off . . . . . . . . . . . . . . . . . . . . . . . 1108.3 Flaring device . . . . . . . . . . . . . . . . . . . . . 1114.1–1114.3 High probability. . . . . . . . . . . . . . . . . . . . . . . . . 1103.2.1 Highside, definition . . . . . . . . . . . . . . . . . . . . . . . . 210.0 Human comfort . . . . . . . . . . . . . . . . . . . . . . . . . . 1105.1 Labeling. . . . . . . . . . . . . . . . . . . . . . 307.3, 307.4, 1115.3 Low probability . . . . . . . . . . . . . . . . . . . . . . . . . 1103.2.2 Lowside, definition. . . . . . . . . . . . . . . . . . . . . . . . . 214.0 Machinery room. . . . . . . . . . . . . . . . . . . . 220.0, 1106.0,

1107.0, 1115.3 Maintenance and operation . . . . . . . . . . . . . . . . . 1118.0 Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . 220.0, 934.3 Mechanical system, definition . . . . . . . . . . . . . . . . 220.0 Mechanical ventilation . . . . . . . . . . . . . . . . . . . . . 1107.0 Permissible . . . . . . . . . . . . . . . . . . . . . . . . Table 1104.1 Pressure-limiting devices . . . . . . . . . . . . . . . . . . . 1111.0 Pressure-relief devices . . . . . . . . . . . . . . 1112.0, 1112.9,

1112.10, 1112.11, 1113.4, 1113.5, 1115.4, Table 1113.5 Probability . . . . . . . . . . . . . . . 1103.2, 1103.2.1, 1103.2.2 Protection from

mechanical damage . . . . . . . . . . . . . . . . . . . 1109.4.1 Requirements for . . . . . . . . . . . . . . . . . . . . . . . . . 1104.0 Self-contained mechanical

refrigeration systems . . . . . . . . . . . . . . . . . . . . . 934.3 Self-contained refrigerators

and freezers . . . . . . . . . . . . . . . . . . . . . . . . . . . 934.1 Unit coolers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 934.2 Ventilation of room . . . . . . . . . . . . . . . . . . 1105.5, 1107.0 REFRIGERATORS

Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 926.2 Factory-built . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 934.1 Ventilating kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 928.2 REGULATOR VENT PIPING . . . . . . . . . . . . . . . . 1308.5.4.1 REGULATORS

Combustion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1009.0 Gas appliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . 924.5 Gas-pressure regulators . . . . . . . . . . . . . . . . . . . 1007.0 Vent piping . . . . . . . . . . . . . . . . . . . . . . . . . . 1308.5.4.1 RISER HEAT PIPE

Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220.0 ROOFTOP TERMINATIONS

Chimneys. . . . . . . . . . . . . . . . . . . . . . . 802.5.4, 802.7.2,

803.1.10, 803.2.20 Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 511.1.3.1 Gas vents . . . . . . . . . . . . . . . . . . . . . . 802.6.1, 802.7.2,

803.1.10, 803.2.20 ROOM HEATERS . . . . . . . . . . . . . . . . . . . . . . . 220.0, 916.0

INDEX

ROOM

Bathroom and laundry . . . . . . . . . . . . . . . . . . . . . 504.6 Boiler . . . . . . . . . . . . . . . . . 204.0, 303.2, 1001.2, 1001.4 Equipment . . . . . . . . . . . . . . . . . . . . . . . . 303.2, 305.1.3 HPM storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210.0 Machinery . . . . . . . . . . . . 1106.0, 1107.0, 1108.0, 1115.3 Used for ventilation . . . . . . . . . . . . . . . . . . . . . . 402.2.2 RUPTURE MEMBERS . . . . . . . . . . . . . . . 220.0, 1112.10.1,

1112.13, 1113.3, 1115.4.1

– S – SEDIMENT TRAPS . . . . . . . . . . . . . . . . . . 1310.9.2, 1312.9 SEEPAGE PAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 906.9 SELF-CONTAINED . . . . . . . . . . . . . . . . . . . . . 221.0, 517.1.2 SHAFT

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.0 Fuel gas piping. . . . . . . . . . . . . . . . . . . . . . . . . 1310.3.4 Refrigeration systems . . . . . . . . . . . . . . 305.4, 1109.4.1 Ventilation system . . . . . . . . . . . . . . . . . . . . E 503.4.6.4 SHAFT ENCLOSURE

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.0 SHUTOFF

Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 609.0 Fuel. . . . . . . . . . . . . . . . . . . . . . . 513.4, 513.8, C 102.0,

Table 1003.2.1 SMOKE DAMPERS . . . . . . . . . . . . . . . . . . . . . 206.0, 606.0 SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . 221.0, 609.0 SNOWMELT SYSTEMS . . . . . . . . . . . . . . 1220.4, 1220.4.1,

1217.5.2, Table 1220.4.1 SOLAR ENERGY SYSTEMS . . . . . . . . . . . . . . . . . . . 1502.0. SOLID-FUEL

Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1002.4 Burning appliances . . . . . . . . . . . . . . . . . . . . . . . 902.10 Chimney, combination

gas- and solid-fuel. . . . . . . . . . . . . . . . . . . . 802.5.8.2 Cooking operations . . . . . . . . . . . . . . . . . . . . . . . . 517.0 Furnace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 904.10 Room heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 916.3 Venting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 801.3 SPARK ARRESTERS

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.0 Solid-fuel cooking operations . . . . . . . . . . . . . . . 517.1.6 SPECIFIC APPLIANCES,

INSTALLATION OF . . . . . . . . . . . . . . . . . . . . . . Chapter 9 STANDARDS

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.0 General . . . . . . . . . . . . . . . . . . . . . . . . . . 301.2, 302.1.2 Fire-extinguishing systems. . . . . . . . . . . . . . . . . 513.2.2 Fuel gas piping. . . . . . . . . . . . . . . . . . . . . . . . . . D 115.1 Hydronics . . . . . . . . . . . . . 1203.2, 1207.3, Table 1210.1 Oil-or liquid-fuel

burning equipment. . . . . . . . . . . . . . . . . . . . . C 103.0 Referenced. . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 17 Steam and hot water boilers . . . . . . . . . . . . . . . . 1002.0

2022 CALIFORNIA MECHANICAL CODE 531

INDEX

STATIONARY

Engine generators. . . . . . . . . . . . . . . . . . . . . . . . 1602.0 Fuel Cell Power Plant . . . . . . . . . . . . . . . . 221.0, 1601.0 Gas Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . .1602.0 STEAM AND HOT-WATER SYSTEMS . . . . . . . . . . . . . .319.0 SUPPORT AND HANGERS . . . . . . . . . .313.0, Table 313.3 SUSTAINABLE PRACTICES . . . . . . . . . . . . . . .Appendix E SWITCHES, ELECTRICAL SUPPLY LINE . . . . . . .903.2.6

– T – TANKLESS WATER HEATERS . . . . . . . . . . . . . . . . .1203.3 TERMINATION

Chimneys . . . . . . . . . . . . . . . . . . . . .802.5.4, 802.5.4.2 Environmental air ducts . . . . . . . . . . . . . . . . . . .502.2.1 Exhaust duct systems,

commercial kitchen . . . . . . . . . . . . . . . . .510.9, 519.5 Exhaust

ducts, clothes dryer . . . . . . . . . . . . . . . . . . . . . .504.4 Gas vents . . . . . . . . . . . . . . . . . . . . . . . .802.6, 802.6.1,

802.7.2, 802.8, 802.8.2 Product conveying ducts . . . . . . . . . . . . . . . . . .502.2.2 Type I hood exhaust system . . . . . . . . . . . . . . . . .510.9 Type II hood exhaust system . . . . . . . . . . . . . . . . .519.5 TESTING

Of boilers . . . . . . . . . . . . . . . . . . . . . . . . .1012.1, 1013.0 Of ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .602.2 Of exhaust systems . . . . . . . . . . . . . . . . . . . . . . . .514.0 Of fuel-gas piping . . . . . . . . . . . . . . . . . . .105.3, 1313.0 Of hood assemblies . . . . . . . . . . . . . . . . . . . . . . .508.2 Of insulating materials . . . . . . . . . . . . . .508.3.4, 602.2 Of louvers . . . . . . . . . . . . . . . . . . . . . . .315.1.1, 315.1.2 Of recirculating systems . . . . . . . . . . .516.2.2, 516.2.5,

516.6.4 Of refrigerating equipment . . . . . . . . . . . .105.3, 1114.3,

1116.0 Of safety interlocks . . . . . . . . . . . . . . . . . . . . . . .516.6.4 Required by the Authority

Having Jurisdiction . . . . . . . . . . . . . . . . . . . . .302.2.1 TESTING AGENCY

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .222.0 TESTING AND BALANCING . . . . . . . . . . . . . . . . . . . . . 417.0 THERMAL RECOVERY UNIT

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .222.0 TOILETS, GAS FIRED . . . . . . . . . . . . . .929.0, Table 802.4 TYPES OF

Chimneys . . . . . . . . . . . . . . . . . . . . . . . .(see Chimney)

– U – UMC

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223.0 UNCONSTITUTIONAL . . . . . . . . . . . . . . . . . . . . . . . . .101.4 UNDER-FLOOR SPACE . . . . . . . . . . . . . . . . . .304.4, 608.0 UNIT HEATER . . . . . . . . . . .223.0, 917.0, Table E 503.7.1(5) UNSAFE EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . .102.5 UNUSUALLY TIGHT CONSTRUCTION

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223.0

– V – VALIDITY OF PERMITS . . . . . . . . . . . . . . . . . . . . . .104.4.2 VALVE TYPES

Bleed lines for diaphragm-type . . . . . . . . . . . . . .902.16 Companion or block, definition . . . . . . . . . . . . . . .224.0 Pressure relief . . . . . . . . . . . . . . . . . . . . . .224.0, 904.6,

927.3, 1112.0, 1113.0, 1115.4, C 109.1 Safety or relief . . . . . . . . . . . . .1005.0, 1009.0, C 109.1 Shutoff . . . . . . . . .904.6, 1006.0, 1308.13, 1310.10.1.1,

1310.11, 1312.3.1, 1312.3.2, 1312.5.3, 1312.6, 1406.2.1.5, C 109.1, D 103.0, D 104.3,

D 110.4, D 112.3 Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224.0, 1112.6 VALVES

For fuel gas piping . . . . . . . . . . . .1308.5.1, 1308.5.7.5,

1308.11.1, 1308.13, 1309.1, 1310.3.3.1, 1310.10.1.1, 1310.11, 1310.14.6, 1312.3.1, 1312.3.2, 1312.5.3, 1312.6, 1312.9, 1313.1.4, 1313.1.5, D 103.0, D 104.3, D 110.4,

D 112.3, D 113.3 For hydronics . . . . . . . . . . . . . . . . . . . . . . . . . . . .1212.0 For mobile home parks . . . .D 103.0, D 104.3, D 110.4,

D 112.3, D 113.3 For recreational vehicle park . . . . . . .D 103.0, D 104.3,

D 110.4, D 112.3, D 113.3 For refrigeration systems . . . . . . . . . . . .1105.3, 1109.0,

1110.0, 1112.6, 1112.9, 1113.6 VENT

Appliances not requiring vents . . . . . . . . . . . . . .802.2.1 Caps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .802.7.4(3) Clearance . . . . . . . . . . . . . . .802.7.3.4, Table 303.10.1,

Table 802.7.3.3 Dampers . . . . . . . . . . . . . . . . .802.13, 802.15, 802.15.1 Direct vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . .802.2.6 General requirements . . . . . . . . . . . . . . . . . . . . . .802.0 Insulation shield . . . . . . . . . . . . . . . . . . . . . . . .802.6.1.1 Integral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .802.2.7 Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .802.1 Mechanical draft . . . . . . . . . . . . . . . .802.3.3–802.3.3.5 Obstruction of flow . . . . . . . . . . . . . . . . . . . . . . .802.14 Plastic piping . . . . . . . . . . . . . . . . . . . . . . . . . . .802.4.1 Special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .802.4.3 Termination . . . . . . . . . . . . . . . . . . . . .802.6.1, 802.7.2,

802.8 Wall penetration . . . . . . . . . . . . . . . . . . . . . . . . . .802.8 VENT, ATTIC . . . . . . . . . . . . . . . . . . .802.10.1.1, 802.10.1.2 VENT, GAS . . . . . . . . . . . . . . .224.0, 802.4, 802.6, 802.6.2,

802.6.2.1, 802.6.2.2

532 2022 CALIFORNIA MECHANICAL CODE

INDEX

2022 CALIFORNIA MECHANICAL CODE 533

534 2022 CALIFORNIA MECHANICAL CODE

HISTORY NOTE APPENDIX

CALIFORNIA CODE OF REGULATIONS, TITLE 24, PART 4

HISTORY: For prior code history, see the History Note Appendix to the California Mechanical Code, 2019 Triennial Edition, effec- tive January 1, 2020.

1. (BSC 01/21, CEC 03/21, DSA-SS 01/21, HCD 01/21, OSHPD 01/21, SFM 01/21) Adoption by reference the 2021 Uniform Mechanical Code with necessary amend- ments to become the 2022 California Mechanical Code, and repeal of the 2018 edition of the Uniform Mechan- ical Code; effective on January 1, 2023.

2022 CALIFORNIA MECHANICAL CODE 535

536 2022 CALIFORNIA MECHANICAL CODE

LICENSE AGREEMENT INTERNATIONAL ASSOCIATION OF PLUMBING AND MECHANICAL OFFICIALS (IAPMO)

CALIFORNIA MECHANICAL CODE E-BOOK – 2022 EDITION

The International Association of Plumbing and Mechanical Officials (“IAPMO”) agrees to grant, and the user of the eBook agrees to accept, a nonexclusive license to use the eBook under the terms and conditions of this eBook License Agreement (“Agreement”). Your use of the eBook constitutes your agreement to the terms and conditions set forth in this Agreement. This Agreement, or any part thereof, cannot be changed, waived, or discharged other than by a statement in writing signed by you and IAPMO. Please read the entire Agreement carefully.

eBook Usage The IAPMO eBook may be used by one user on one computer. The user of the eBook shall be subject to all of the terms of this Agreement, whether or not the user was the purchaser.

Copyright, Use and Resale Prohibitions IAPMO retains all rights not expressly granted to you in this Agreement. The software, content, and related documentation in the eBook are protected by copyright laws and international copyright treaties, as well as other intellectual property laws and treaties. Nothing in this Agreement constitutes a waiver of IAPMO’s rights. IAPMO will not be responsible for performance problems due to circumstances beyond its reasonable control. Other than as stated in this Agreement, you may not copy, print, modify, remove, delete, augment, add to, publish, transmit, sell, resell, license, create derivative works from, or in any way exploit any of the eBook’s content, in whole or in part, in print or electronic form, and you may not aid or permit others to do so. The unauthorized use or distribution of copyrighted or other proprietary content is illegal and could subject the purchaser to substantial damages. Purchaser will be liable for any damage resulting from any violation of this Agreement.

No Transfer This license is not transferable by the eBook purchaser unless such transfer is approved in advance by IAPMO, in which case the transferee will be subject to the terms and conditions of this Agreement.

Disclaimer The eBook, or any support given by IAPMO’s technical support staff, are in no way substitutes for assistance from legal, tax, accounting, or other qualified professionals. If legal advice or other expert assistance is required, the services of a competent professional person should be sought.

Limitation of Liability The eBook is provided “as is” and IAPMO does not make any warranty or representation, either express or implied, to the eBook, including its quality, accuracy, performance, merchantability, or fitness for a particular purpose. You assume the entire risk as to the results and performance of the eBook. IAPMO does not warrant, guarantee, or make any representations regarding the use of, or the results obtained with, the eBook in terms of accuracy, correctness or reliability. In no event will IAPMO be liable for indirect, special, incidental, or consequential damages arising out of delays, errors, omissions, inaccuracies, or the use or inability to use the eBook, or for interruption of the eBook, from whatever cause. This will apply even if IAPMO has been advised that the possibility of such damage exists. Specifically, IAPMO is not responsible for any costs, including those incurred as a result of lost profits or revenue, loss of data, the cost of recovering such programs or data, the cost of any substitute program, claims by third parties, or similar costs.

Hold Harmless / Indemnification. You agree to defend, indemnify and hold IAPMO and any third party provider harmless from and against all third party claims and damages (including reasonable attorneys’ fees) regarding your use of the eBook, unless the claims or damages are due to IAPMO’s or any third party provider’s gross negligence or willful misconduct or arise out of an allegation for which IAPMO is obligated to indemnify you.

Termination If you materially breach this License Agreement, we may terminate your right to use the Material immediately upon notice to you.

You agree that, upon termination of the License Agreement, you will either return to us or destroy all copies of the Material in your possession.

Additional Terms This written License Agreement is the exclusive agreement between you and us concerning the eBook and supersedes any and all prior oral or written agreements, negotiations, or other dealings between us concerning the eBook.

This License Agreement may be modified only by a writing signed by the user and IAPMO.

In the event of litigation between the user and IAPMO concerning the eBook, the prevailing party in the litigation and the prevailing party in any ancillary disputes (e.g., discovery disputes) will be entitled to recover attorneys’ fees and expenses from the other party.

This License Agreement is governed by the laws of the State of California applicable to contracts executed and performed entirely in, and by residents of, that state.

This License Agreement is effective immediately upon your installation or use of the eBook.

If you have any questions regarding this License Agreement, please write to the International Association of Plumbing and Mechanical Officials (IAPMO), 4755 East Philadelphia Street, Ontario, California 91761-2816.

This agreement is governed by the laws of the State of California applicable to contracts executed and performed entirely in, and by residents of, that state.