Appendix G — EXAMPLE CALCULATION OF OUTDOOR AIR RATE
California Mechanical Code (Title 24, Part 4) · 2019 edition · updated 2026-09-10 · California
Italicized text is a California amendment to the model code, as printed in the official publication.
(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.)
| Adopting Agency | BSC | BSC- CG |
SFM | HCD | DSA | OSHPD | BSCC | DPH | AGR | DWR | CEC | CA | SL | SLC | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adopting Agency |
**BSC ** | BSC- CG |
SFM | 1 | 2 | 1-AC | **AC ** | SS | SS/CC | 1 | 1R | 2 | 3 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
amended (amended sections listed below) |
|||||||||||||||||||||||
that are listed below |
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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.
2019 CALIFORNIA MECHANICAL CODE 485
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APPENDIX G
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.
G 101.0 Example Calculation of Outdoor Air Rate.G 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:
RpPz + RaAz
RpPz +
Vot =
Ez
5 x 100 + 0.06 x 2000
1.0
(Equation G 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.
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.
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 .
e 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 .
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.
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.
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
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any other purpose or distributed to any other persons or parti es.
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INDEX
© 2018 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, 510.3.6.1, 514.4.8, 514.4.9 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 . . . . . . . . . . . . . . . . . . . . 1310.8.1 Evaporative coolers. . . . . . . . . . . . . . . . . . . . . . . . 933.3 Fire dampers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 605.5 Floor furnace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 906.8 Fuel gas meters . . . . . . . . . . . . . . . . . 1308.6.1, D 104.2 Fuel gas piping . . . . . . . . . . . . . . . . . . . . . . . 1310.2.2.1 Fuel gas pressure regulators . . . . . . . . . . . . . .1308.7.2,
1310.4.1 Grease filters. . . . . . . . . . . . . . . . . . . . . . . . . . 509.2.3.2 Lapped flanges . . . . . . . . . . . . . . . . . . . . . . 1308.5.10.6 Motors and fans, exhaust systems . . . . . . . . . . . . 503.1 Refrigeration equipment . . . . . . . . . . . . . . . . . . . 1105.3 Smoke dampers . . . . . . . . . . . . . . . . . . . . . . . . . . 605.5 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
Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407.3 Circulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407.4 Classification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403.9 Combustion . . . . . . . . . . . . . . . . . (see Combustion Air)
Dilution. . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0, 701.1,
802.6.3.1, 902.12
Distribution . . . . . . . . . . . . . . . . . . . . . . . . . 414.2, 415.1
Ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (see Ducts)
Economizer . . . . . . . . . . . . . . . . . (see Economizer, air)
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, 608.1 Outside . . . . . . . . . . . . . . . . . . . . . . . 203.0, 311.1, 311.3 Pollution control
devices. . . . . . . . . . . . . . . . . . 203.0, 512.3.1, 512.3.2 Recirculation. . . . . . . . . . . . . . . . . 403.7, 403.9, 512.3.2 Relief. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 Replacement . . . . . . . . . . . . . . . . . . . (see Air, makeup) Return. . . . . . . . . . . . . . . . . . . 203.0, 311.1, 311.3, 311.4 Supply . . . . . . . . . . . . . . 203.0, Chapter 4, 914.5, 915.5 Ventilation. . . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 4 AIR CONDITIONED
Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 AIR CONDITIONING
Coils. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 903.2.6 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
Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0 Openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305.2.2
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INDEX any other purpose or distributed to any other persons or parti es.
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
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, 904.12, 906.13,
907.4, 917.6, 921.3
Open-top broiler units . . . . . . . . . . . . (see Broiler units)
Outdoor cooking . . . . . . . . . . . . . . . . . . . . . . . . . . 923.0
Pit location . . . . . . . . . . . . . . . . . . . . . . . . . . . . .303.13
Protection against
flood damage . . . . . . . . . . . . . . . . . . . . . . . . . . 305.2
Range . . . . . . . . . . . . . . . . . . . . . . . 920.1, 921.1, 921.3
Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 934.0
Refrigerators . . . . . . . . . . . . . . . . . . (see Refrigerators)
Room heaters. . . . . . . . . . . . . . . . . . (see Heater, room)
Solid-fuel burning . . . . . . 902.10, 904.11, 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)
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INDEX
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 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, 904.9, 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 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 MONOZIDE 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 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 E 505.5, | |
| Table E 505.6 | |
| Hydronics . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1 | |
| Joining | |
| and connections . . . . . . (see Joints and connections) | |
| CIRCULATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1208.0 | |
| CLASSIFICATION OF | 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, 303.10, 303.10.1,
304.1, 304.3.1.1, 516.2.1, 701.6.2, Table 303.10.1 Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . 303.2, 904.2.2,
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
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Draft hoods and controls . . . . . . . . . . . . . . . . . 802.12.6 Ducts, clothes dryer . . . . . . . . . . . . . . . . . . . . 504.4.3.1 Ducts, commercial kitchen
exhaust . . . . . . . . . . . . . . . . . . . . . . . .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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506.10, Equipment on roofs . . . . . . . . . . . . . . . . 303.8, 303.8.4,
304.2, 304.3.1.1 Fans, commercial
kitchen exhaust . . . . . . . . . . . . . . . . . . . . . . . . 510.7.3 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, 931.5.5 Illuminating appliances . . . . . . . . . . . . . . . 924.1, 924.2,
924.2.1, Table 924.2.1 Infrared heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . 926.2 Kilns . . . . . . . . . . . . . . . . . . . . . . . . . . . 931.5.1, 931.5.5 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 CLOSE COMBUSTIBLE CONSTRUCTION
Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 CLOSET OR ALCOVE INSTALLATIONS
Air conditioners . . . . . . . . . . . . . . . . . . . . . . . . . 903.2.5 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 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, F 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 . . . . . . . . . . . . . . . . . . . . . . . 1310.3.1
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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 From air
conditioning equipment . . . . . . . . 310.1, 310.2, 310.5 From air cooling coils . . . . . . . . . . . . . . . . 310.2, 1105.7 From appliances . . . . . . . . . . . . . . . . . . . . . . . . . . 310.4 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 . . . . . . . . . . . . . . . . . . . . . 904.8 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 CONFLICT 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. . . . . . . . . . . . . . . . . . . . . 510.9.1.1,
1312.5.2, 1312.5.3 Gas vent . . . . . . . . . . . . . . . . . 224.0, 802.2, 802.3.3.3,
802.5.5, 802.7.4.1, 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 CONSTRUCTION DOCUMENTS
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 For Permits . . . . . . . . . . . . . . . . . . 1.11.3, 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 COOLING
Air system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311.0 Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 904.9 Correctional Treatment Centers . . . . . . . . . 319.1, 319.2 Evaporative cooling system . . . . . . . . . . . . 207.0, 933.0 System, definition . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 Towers . . . . . . . . . . . . . . . . . . . . . . . Chapter 11 (Part II) Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0, 904.9 COPPER OR COPPER
ALLOY PIPE AND TUBING . . . . . . . . . . . . . . . . . . . 1211.3 CORRUGATED STAINLESS STEEL
TUBING (CSST)
Bonding of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1311.2 Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0 Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1310.2.4.1 Test pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1313.3 CREMATORIES
Factory built . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 926.2 CROSS-LINKED POLYETHYLENE (PEX)
PIPING OR TUBING
Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Ground source loop . . . . . . . . . . . . . . . . Table E 505.5,
Table E 505.6 Hydronics . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1,
Table 1220.2.1 Joining and connections. . . . . . . . . . . . . . . . (see Joints
and connections) Oxygen diffusion . . . . . . . . . . . . . . . . . . . . . . . . . 1210.4 CROSS-LINKED POLYETHYLENE-ALUMINUM- CROSSLINKED 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 . . . . . . . . . . . . . . . . . . . . . 205.0, 605.3 Chimney, free opening area . . . . . . . . . . . . . Table 911.2
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Combination fire and smoke . . . . . . . . . . . . . . . . . 205.0 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, 605.2, 605.5, 933.1 Fire and smoke, access to . . . . . . . . . . . . . . . . . . 605.5 Freedom from interference . . . . . . . . . . . . . . . . . . 605.6 Heating, ventilation,
and air conditioning . . . . . . . . . . . . . . . . . . . E 502.12 HVAC system tests of . . . . . . . . . . . . . . . . . . . . E 805.0 Identification of . . . . . . . . . . . . . . . . . . . . . . . . . . . 605.5 In ducts, commercial
kitchen exhaust . . . . . . . . . . . . . . . . . . 512.1, 512.1.1 In duct furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . 905.6 Manually operated . . . . . . . . . . . . . . 802.13, E 502.10.2 Minimum leakage . . . . . . . . . . . . . . . . . . . E 503.4.6.4.2 Motorized, nonrecirculating
air heating. . . . . . . . . . . . . . . . . . 914.7, E 503.4.6.4.1 Multiple arrangements . . . . . . . . . . . . . . . . . . . . . 605.4 Return air . . . . . . . . . . . . . . . . E 503.5.1.3, E 805.5.1.2,
E 805.5.2, E 805.12.1.1 Smoke . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.0, 605.1 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 sensing. . . . . . . . . 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, 513.1.1, 514.4.1, 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 . . . . . . . . . . . . . . . . 305.4, 310.2, 1105.7 DUCTLESS MINI-SPLIT SYSTEMS . . . . . . . . . . . . . . 935.0 DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 6
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 . . . . . . . . . . . . . . . . . . . . . . 603.11 Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.0 Domestic range vents . . . . . . . . . . . . . . . . . . . . . . 504.3 Duct . . . . . . . . . . . . . . . . 409.0 (OSHPD 1, 1R, 2, 3 & 4) Environmental air . . . . . . . . . . . . . . . . . . . . 207.0, 504.0 Exhaust, commercial kitchen . . . . . . . . . . . . . . . . 510.0 Existing metal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.2 Factory-made air. . . . . . . . . . . . . . . . . . . . 602.6, 603.4,
603.4.1, 603.8 Fire protection required . . . . . . . . . . . . . . . . . . . . . 506.8 Flexible . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 602.6.1 Flexible air ducts and connectors . . . . . . . . . . . . . 603.5 For kilns . . . . . . . . . . . . . . . . . . . 931.5.3, 931.5.5, 931.6 Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.0, 905.0 Gravity ventilation. . . . . . . . . . . . . . . . . . . . . . . . 931.5.3 Grease type . . . . . . . . . . . . . . . . . . . . . . . . 209.0, 510.0 Gypsum wallboard . . . . . . . . . . . . . . . . . . . 504.6, 602.5 In under floor or crawl spaces. . . . . . . . . . . . . . . . 603.2 Inspection and cleaning of . . . . . . . . . . . 514.2, 514.4.1 Insulation of . . . . . . . . . . . . . . . . . . . . 604.0, E 502.4.1,
E 503.4.7.1, Table E 503.7.2–Table E 503.7.3(2) Joints and seams . . . . . . . 603.10, 603.10.1, 603.10.1.1 Manifold (common duct) . . . . . . . . . . . . . . . . . . . . 511.4 Material of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506.1,
510.5.1, 602.0 Metal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506.1, 602.3,
603.3 Non-grease type. . . . . . . . . . . . . . . . . . . . . 519.4, 519.5 Openings. . . . . . . . . . . . . . . . 510.3, 510.3.3–510.3.3.2,
510.3.4.2, 511.1.5 Other grease . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 510.5 Plastic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 603.6 Product-conveying . . . . . . . . . . . . . . . . . 218.0, 502.2.2,
506.0, Table 506.2(1), Table 506.2(2) Protection of. . . . . . . . . . . . . . . . . . . . . . . . 506.9, 603.7 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, 603.3–603.3.2, 603.8 Termination . . . . . . . . . . . . . . . . . . . . . . . . 222.0, 502.2,
510.9, 519.5, 701.11 Underground . . . . . . . . . . . . . . . . . . . . . . 510.8, 603.12
494 2019 CALIFORNIA MECHANICAL CODE
INDEX
- **E –**
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
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. . . . . . . . . . . . . . 305.2
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
For health care facilities . . . . . . . . . . . . . . . . . . . . 405.0
EVAPORATOR
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207.0
EXCESS FLOW VALVE . . . . . . . . . . . . . . . . . . . . . . . . 207.0,
1309.0, 1406.2.1.5
EXHAUST
Bathroom exhaust fans. . . . . . . . . . . . . . . . . . . . . 402.5 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 Mechanical . . . . . . . . . . . . . . . . . . . . . 403.7, Chapter 5,
1105.5.2, 1106.0, Table 403.7 Product conveying . . . . . . . . . . . . . . . . . . . 505.0, 506.0 Refrigeration
machinery room . . . . . . . . . . . . . . . . 1105.5.2, 1106.0 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 418.2 Separation from
other exhaust . . . . . . . . . . . . . . . . . . . . . . . . . 517.3.1 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 Correctional Treatment Centers. . . . . . . . . . . . . . . 408.3 Efficiencies . . . . . . . . . . . . . . . . . . . . . . Tables 4-B, 4-C General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408.1 Grease . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209.0, 509.1 Hospitals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408.2 In mechanically ventilated buildings . . . . . . . . . . . 401.2 In recirculating systems. . . . . . . . . . . . . . . . . . . . . 516.3 Return air . . . . . . . . . . . . . . . . . . . . . E 603.1.1, E 603.3 FIRE
. . . . . . . . . . . 408.1 Grease . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209.0, 509.1 Hospitals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408.2 In mechanically ventilated buildings . . . . . . . . . . . 401.2 In recirculating systems. . . . . . . . . . . . . . . . . . . . . 516.3 Return air . . . . . . . . . . . . . . . . . . . . . E 603.1.1, E 603.3 FIRE
Code, definition. . . . . . . . . . . . . . . . . . . . . . . . . . . 208.0 Damper . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.0, 605.0 Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 510.7.7 Extinguishing equipment . . . . . . . . 513.0, 513.13, 517.7
2019 CALIFORNIA MECHANICAL CODE 495
INDEX any other purpose or distributed to any other persons or parti es.
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,
1308.5.8.4, 1308.5.9, 1310.3.1 Fuel gas vent . . . . . . . . . . . . . . . . . . . .803.2.8, 803.2.9 Hydronic piping . . . . . . . . . . . . . . .1210.0, Table 1210.1 Refrigeration piping . . . . . . . . . . . . . .1109.1.1, 1109.1.2 FLAMMABLE VAPORS
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .902.7 FLOOD RESISTANT CONSTRUCTION
Coastal high hazard area . . . . . . . . . . . .205.0, 305.2.1 Design flood elevation . . . . . . . . . . . . . . . . . . . . . .206.0 Flood hazard area . . . . . . . . . . . . . . . . . . . . . . . . .208.0 Flood hazard resistance . . . . . . . . . . . . . . . . . . . .305.2 FLOOR FURNACE . . . . . . . . .(see Furnaces, floor furnace) FUEL
Appliance . . . . . . . . . . . . . . . . . . . . . .(see Appliances) Appliance, connectors, definition . . . . . . . . . . . . .203.0 Shutoff . . . . . . . . . . . . . . . . . . . . .513.4, 513.9, C 102.0,
Table 1003.2.1 Solid-fuel cooking . . . . . . . . . . . . .221.0, 508.6, 510.10,
511.1, 511.5, 513.13, 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 . . . . . . . . . . . . . . . . . . . . . . . 1310.7 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 . . . . . . . . . . . . . . 1308.5.4–1308.5.9,
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1310.2.4,
Table 1310.2.4.1 Underground
installations . . . . . . . . . . . . . . 1308.5.2.3, 1308.5.3.3,
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 . . . . . . . . . . . . . . . . . . . . . . . 1310.7 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 . . . . . . . . . . . . . . 1308.5.4–1308.5.9,
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. . . . . . . . . . . . . . . . 1310.2.4, Table 1310.2.4.1 Underground installations . . . . . . . . . . . . . . 1308.5.2.3,
1308.5.3.3, 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. . . . . . . . . . . . . . . . . . . 607.6 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
496 2019 CALIFORNIA MECHANICAL CODE
INDEX
Horizontal-type furnace . . . . . . . . . . . . . . 208.0, 904.10 Oil-fired central furnace. . . . . . . . . . . . . . . . . . . . 904.12 Seepage pan, floor furnace . . . . . . . . . . . . . . . . . 906.9 Solid fuel furnace . . . . . . . . . . . . . . . . . . . . . . . . 904.11 Upflow-type, heating . . . . . . . . . . . . . . . . 208.0, 904.10 Wall furnace, vented . . . . . . . . . . . . . . . . . 224.0, 907.0,
Table 802.4 Warm air. . . . . . . . . . . . . . . 225.0, 607.6, 607.7, 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 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 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,
513.1.1, 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, 1310.2.4,
Table 1310.2.4.1 Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . .917.1, 926.1 Hydronics system piping . . . . . . . . . . . . . . . . . . .1210.3 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
Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E 505.1.2 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 928.0 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
2019 CALIFORNIA MECHANICAL CODE 497
INDEX any other purpose or distributed to any other persons or parti es.
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 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 Laboratory fume . . . . . . . . . . . . . . . . . . . . . . . . . . 410.3 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
. . . . . . . . . . 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, 1220.2.5, 1217.5.2 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 . . . . . . . . . . . . . . 1220.2, 1220.2.1,
1217.5.2, Table 1220.2.1 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
Definition,. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211.0 Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . 1106.2.2 INCINERATORS
Commercial and
industrial type . . . . . . . . . . . . . . . . . . . . . . . . . . 925.0 Fume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208.0, 512.3 Residential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 925.3 INDUSTRIAL HEATING EQUIPMENT
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211.0 INSANITARY LOCATION
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211.0 INSPECTIONS
Chimneys. . . . . . . . . . . . . . . . . . . . . . . 802.5.6, 802.5.7 Commercial kitchen
exhaust system, schedule of . . . . . . . . . . Table 514.3 Evaporative cooler . . . . . . . . . . . . . . . . . . . . . . . . 933.3 Fire-extinguishing equipment . . . . . . . . . . . . . . . . 514.2 Fuel gas piping. . . . . . . . . . . . . . . . . . . . . . . . . . 1303.0,
1304.0, 1313.1 Reinspections . . . . . . . . . . . . . . . . . . . . . . . . . . 105.2.6 Requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105.2.3 INSTALLATIONS OF
Appliances in manufactured housing . . . . . . . . . . 930.0 Appliances in garages. . . . . . . . . . . . . . . . . . . . . . 305.1 Appliances in repair garages . . . . . . . . . . . . . . 303.11.1 Ducts. . . . . . . . . . . . . . . . . . . . . . . . . . . . 510.5.3, 603.0 Equipment and appliances . . . . . . . . . . . . . . . . . . 303.0 Gas piping . . . . . . . . . . . . . . . . . . . . . . . 1310.0, 1310.2,
1310.9, 1312.10 Overhead heaters in
commercial garages
and aircraft hangars. . . . . . . . . . . . . . . 905.7, 926.4
498 2019 CALIFORNIA MECHANICAL CODE
INDEX
INSULATION OF
Ducts. . . . . . . . . . . . . . . . . . . . . . . . . 506.11.2, 506.11.3,
604.0, E 502.4.1, E 503.4.7, Table E 503.7.2, Hoods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 508.3.4 Hydronic systems . . . . . . . . . . . . . . . . . . . . . . . . 1205.0 HVAC system piping. . . . . . . . . . . . . . . . . . . . . E 502.5,
E 503.4.7.1.2, Table E 502.5, Table E 503.7.3(1) INTERLOCK
Air heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 914.7 Cooking equipment
ventilation . . . . . . . . . . . . . . . . . . . . . . 517.1.3, 517.6.2 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211.0 Exhaust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503.1 Gas mixing machines. . . . . . . . . . . . . . . . . . . 1310.14.5 Inspection of safety . . . . . . . . . . . . . . . . . . . . . . 516.6.4 Mechanical air supply . . . . . . . . . . . . . . . . . . . . . 701.9.2 Motorized louvers . . . . . . . . . . . . . . . . . . . . . . . 701.10.2 Recirculating systems . . . . . . . . . . . . . . . . . . . . . . 516.3 Stack dampers . . . . . . . . . . . . . . . . . . . . . . . . . . 1003.4
– J – JOINTS AND CONNECTIONS . . . . . . . . . . . . . . . . . 1109.2,
1109.8, 1211.0, 1308.5.8–1308.5.10.6, E 506.0 Brazed joint . . . . . . . . . . . . . . . . . . . . . . . 212.0, 1211.3 Copper or copper
alloy pipe or tubing . . . . . . . 1109.2, 1211.3, 1211.14.1 CPVC piping . . . . . . . . . . . . . . . . . . . . . 1211.2, E 506.7 Embedded piping and joints . . . . . . . . . . . . . . . . 1221.2 Expansion joint. . . . . . . . . . . . . . . . . . . . . . . . . 1313.2.2 Flared. . . . . . . . . . . . . . . . . . . . . . . . . . . . 212.0, 1211.3,
1308.5.8.3, 1308.5.8.4 Mechanical joint . . . . . . . . . . . . . . 212.0, 1109.7, 1211.5,
1211.6, 1211.7, 1211.8, 1211.11, 1211.12, 1308.5.9.3, E 506.5, E 506.10.2 PE pipe or tubing . . . . . . . . . . . . . . . . . . 1211.7, E 506.9 PE-AL-PE pipe or tubing . . . . . . . . . . . . . . . . . . . 1211.8 PE-RT piping or tubing. . . . . . . . . . . . . 1211.9, E 506.11 PEX pipe or tubing. . . . . . . . . . . . . . . . . 1211.5, E 506.8 PEX-AL-PEX pipe or tubing . . . . . . . . . . . . . . . . . 1211.6 Plastic piping, joints, and fittings . . . . . . . . . . . 1211.14.2 PP piping or tubing. . . . . . . . . . . . . . . 1211.10, E 506.10 Press-Connect, definition . . . . . . . . . . . . . . . . . . . 212.0 PVC piping . . . . . . . . . . . . . . . . . . . . . 1211.11, E 506.12 Soldered joint . . . . . . . . . . 212.0, E 506.8.2, E 506.11.2 Solvent cement
plastic pipe. . . . . . . . . . . . . . . . . . . . . 1211.2, 1211.11,
E 506.7.2, E 506.12.1
Steel pipe or tubing . . . . . . . . . . . . . . . . 1109.2, 1211.12 Threaded joint . . . . . . . . . . . . . . . . . . . . 1211.2, 1211.12,
E 506.7.1, E 506.12.2 Various materials . . . . . . . . . . . . . . . . . 1211.13, E 506.2 Welded joint. . . . . . . . . . . . . . . . . . . . . . . 212.0, 1211.12 Welded joint (thermoplastic) . . . . . . . . . . . . . . . E 506.6 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 Product conveying ducts . . . . . . . . . . . . . . 505.1, 505.3 Refrigeration . . . . . . . . . . . . . . . . . . . 1104.4, 1106.2.5.2 LINE CONTACT INSTALLATION
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 LIQUEFIED PETROLEUM GAS (LPG)
Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.7.1 Automatic control devices . . . . . . . . . . . . . . . . . . . 306.0 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 Gas Facilities . . . . . . . . . . . . . . . . . . . . . 214.0, 1312.11 Shutoff devices. . . . . . . . . . . . . . . . . . . . . . . . . . D 110.4 Supply connections . . . . . . . . . . . . . . . D 101.2, D 106.1 LISTED
. . . . . . . . . 303.7.1 Automatic control devices . . . . . . . . . . . . . . . . . . . 306.0 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214.0 Gas Facilities . . . . . . . . . . . . . . . . . . . . . 214.0, 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
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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
Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215.0 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 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 Essential provisions. . . . . . . . . . . . . . . . . . . . . . . . 321.0 In elevator shaft. . . . . . . . . . . . . . . . . . . . . . . . . . . 305.3 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 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 . . . . . . . . . . . . . . . . . 305.2.2, 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
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OUTDOOR AIR INTAKES . . . . . . . . . . . . . . . . . . . . . . . 407.2 OUTDOOR AIR RATE
Calculation . . . . . . . . . . . . . . . . . . . . . . . . . Appendix G 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, 1310.9,
1312.8, 1314.4 OVER PRESSURE PROTECTION
Fuel gas piping. . . . . . . . . . . . . . . . . . . 1308.7.1, 1310.6 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 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 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, 1310.2.4, 1310.2.4.1,
Table 313.3, Table 1310.2.4.1
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 . . . . . . . . . . . . . . . . . . . . . . . . . 603.10 Combustibles within . . . . . . . . . . . . . . . . . . . . . . . 602.2 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Furnace. . . . . . . . . . . . . . . . . . . . . . . . 802.3.5, 903.2.3,
903.2.5, 904.2, 904.7 Heating and cooling system . . . . . . . . 604.1, 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 Supply-air. . . . . . . . . . . . . . . . . . . . . 508.3.5, 508.3.5.3,
508.3.5.3.3, 607.0, E 503.4.7.1.1 Use of under-floor as supply plenum . . . . . . . . . . . 607.0 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 E 505.5, Table E 505.6 Hydronics . . . . . . . . . . . . . . . . . . . 1210.0, Table 1210.1 Joining and connections. . . . . . . . . . . . . . . . (see Joints
and connections)
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POLYETHYLENE OF RAISED TEMPERATURE (PE-RT) PIPE OR TUBING
Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Ground source loop . . . . . . . . . . . . . . . . Table E 505.5,
Table E 505.6 Hydronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1210.0,
Table 1210.1, Table 1220.2.1 Joining and connections. . . . . . . . . . . . . . . . (see Joints
and connections) Oxygen diffusion . . . . . . . . . . . . . . . . . . . . . . . . . 1210.4 POLYPROPYLENE (PP) PIPE OR TUBING
Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0 Ground source loop . . . . . . . . . . . . . . . . Table E 505.5,
Table E 505.6 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 E 505.5, Table E 505.6 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 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, 1308.7.6 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, E 507.8 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,
512.3.1, 513.2.1, 516.2.3, 516.5, 1108.1, 1406.2.1.4
Overpressure . . . . . . . . . . . . . . . . . . . . .1308.8, 1310.6 Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301.6 Piping, materials, and structures . . . . . . . . . . . . . .316.0 PROTECTIVE ENVIRONMENT ROOMS . . . . . . . . . . . 415.0 PURGE
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0 Fuel gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1313.6
– 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, 1106.1.4, 1106.5, 1106.0, 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
502 2019 CALIFORNIA MECHANICAL CODE
INDEX
REFRIGERATION EQUIPMENT
Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1105.3 Coils . . . . . . . . . . . . . . . . . 310.6, 903.2.6, 904.8, 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
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 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,
. . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 928.0 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 ROOM
Airborne infection isolations . . . . . . . . . . . . . . . . . 414.0 Bathroom and laundry . . . . . . . . . . . . . . . . . . . . . 504.6 Boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.0, 303.2,
412.0, 1001.2, 1001.4 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412.0 Equipment . . . . . . . . . . . . . . . . . . . . . . . . 303.2, 305.1.3 HPM storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210.0 Machinery. . . . . . . . . . . . . . . . . . . . . . . . 1106.0, 1107.0,
1108.0, 1115.3 Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412.0 Odorous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413.0 Protective environment . . . . . . . . . . . . . . . . . . . . . 415.0 Used for ventilation . . . . . . . . . . . . . . . . . . . . . . 402.2.2 RUPTURE MEMBERS . . . . . . . . . . . . . . . 220.0, 1112.10.1,
1112.11.1, 1112.13, 1113.3, 1115.4.1
– S – SEDIMENT TRAPS . . . . . . . . . . . . . . . . . . 1310.8.2, 1312.9 SEEPAGE PAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 906.9 SELF-CONTAINED . . . . . . . . . . . . . . . . . . . . . 221.0, 517.1.2
2019 CALIFORNIA MECHANICAL CODE 503
INDEX any other purpose or distributed to any other persons or parti es.
SHAFT
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.0 Fuel gas piping. . . . . . . . . . . . . . . . . . . . . . . . . 1310.2.3 Refrigeration systems . . . . . . . . . . . . . . 305.3, 1109.4.1 Ventilation system . . . . . . . . . . . . . . . . . . . . E 503.4.6.4 SHAFT ENCLOSURE
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.0 SHUTOFF
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 608.0 Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 513.4, 513.9,
C 102.0, Table 1003.2.1 SMOKE DAMPERS . . . . . . . . . . . . . . . . . . . . . 206.0, 605.0 SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . 221.0, 608.0 SNOWMELT SYSTEMS . . . . . . . . . . . . . . 1220.2, 1220.2.1,
1217.5.2, Table 1220.2.1 SOLAR ENERGY SYSTEMS . . . . . . . . . . . . . . . . . . . 1502.0. SOLID-FUEL
Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1002.4 Burning appliances . . . . . . . . . . . . . . . . . . . . . . . 902.10 Chimney, combination
gas- and solid-fuel. . . . . . . . . . . . . . . . . . . . 802.5.8.2 Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 904.11 Room heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 916.3 Venting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 801.3 SPARK ARRESTERS
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.0 Solid-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 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 . . . . . . .903.2.7
– 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,
802.6.1.3, 802.6.1.4, 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, 607.0 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, 1308.12, 1310.9.1.1,
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
504 2019 CALIFORNIA MECHANICAL CODE
INDEX
Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224.0, 1112.6 VALVES
For fuel gas piping . . . . . . . . . . . .1308.5.1, 1308.5.8.4,
1308.10.1, 1308.12, 1309.1, 1310.2.2.1, 1310.9.1.1, 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 . . . . . . . . . . . . . . . . . . . . . . . .802.6.1.5, 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 . . . . . . . . . . . . . . . . . . . . . . . .802.6.1.7 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 . . . . . . . . . . . . . . . . . . . .802.6.1–802.6.1.6,
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 VENT, GAS CONNECTORS . . . . . . . . . . .(see Connectors,
gas vent) VENT DAMPERS . . . . . . . . . . . . . . . . . . . . .(see Dampers) VENT SIZING
Category I appliances . . . . . . . . . . . . .802.6.2.1, 803.0 Multiple appliances . . . . . . . . . . . . . . . . . . . . . . .803.2,
Table 803.2(1)–Table 803.2(9) Multistory . . . . . . . . . . . . . . . . . . . . .802.6.3, 802.6.3.2,
803.2.16 Single appliance . . . . . . . .802.7.4.1, 802.10.2.1, 803.1,
Table 803.1.2(1)–Table 803.1.2(6) VENTED
Decorative appliances . . . . . . . . . . . . . . . .224.0, 911.0,
Table 802.4, Table 911.2
Equipment not
required to be . . . . . . . . . . . . . . . . . . . . . . . . .802.2.1 Fireplaces . . . . . . . . . . . . . .912.0, E 602.0, Table 911.2,
Table 1308.4.1 Wall furnace . . . . . . . . . . . . . .224.0, 907.1, Table 802.4 VENTED APPLIANCE CATEGORIES
Category I . . . . . . . . . . . . . . . . . . . . . . . .224.0, 701.1.1,
802.6.2.1, 802.6.3, 802.9.1, 802.10, 802.10.1.1, 802.10.3.2, 803.0, Appendix F, Table 802.4, Table 803.1.2(1)–Table 803.1.2(4),
Table 803.2(1)–Table 803.2(4) Category II . . . . . . . . . . . . . . . . . . . . .224.0, 802.6.2.3,
802.9, 802.11, Table 802.4 Category III . . . . . . . . . . . . . . . . . . . . .224.0, 802.6.2.3,
802.9.1, Table 802.4 Category IV. . . . . . . . . . . . . . . . . . . . . 224.0, 802.6.2.3,
802.9, 802.11, Table 802.4 VENTILATED SPACES . . . . . . . . . . . . . . . . . . . . . . 802.2.5 VENTILATING
Ceiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224.0, 606.0 Equipment . . . . . . . . . . . . . . . . . . . . . . 513.4.2, 514.1.2 Hoods . . . . . . . . . . . . . . . . . . . . . . . . . 802.2.4, 802.3.4,
920.4.2, 922.3 Kits for use in refrigerators . . . . . . . . . . . . . . . . . . 928.2 Laboratory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 410.0 Portable, equipment, definition . . . . . . . . . . . . . . . 218.0 Requirements . . . . . . . . . . . . . . . . . . . . 418.3, Table 4-A VENTILATION
Air class and recirculation. . . . . . . . . . . . . . . . . . . 403.9 Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407.0 Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402.2 Multiple zone systems. . . . . . . . . . . . . . . . . . . . . . 404.0 Natural . . . . . . . . . . . . . . . . . . 402.2, 402.2.1, E 605.1.1 Obstructions of . . . . . . . . . . . . . . . . . . . . . . . . . . 802.14 Parking garages . . . . . . . . . . . . . . . . . . 403.7.1, 403.7.2 Rates . . . . . . . . . . . . . . . . . . . . . . . . 403.0, Table 402.1 VENTILATORS, HEAT
(ENERGY) RECOVERY . . . . . . . . . . . . . . . . 210.0, 504.5 VENTING COLLAR
Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224.0 VENTING SELECTION TABLES
Exterior masonry chimney. . . . . . . . . . Table 803.1.2(6),
Table 803.2(6),
Table 803.2(7), Table 803.2(8),
Table 803.2(9) Masonry Chimneys . . . . . . . . . . . . . . . Table 803.1.2(3),
Table 803.1.2(4),
Table 803.2(3),
Table 803.2(4) Single appliances . . . Table 803.1.2(1)–Table 803.1.2(6) Single-wall metal
pipe or type B
asbestos cement vent . . . . . . . . . . Table 803.1.2(5),
Table 803.2(5)
2019 CALIFORNIA MECHANICAL CODE 505
any other purpose or distributed to any other persons or parti es.
Two or more
appliances . . . . . . . . . Table 803.2(1)–Table 803.2(9) Type B double-wall
gas vent . . . . . . . . . . . . . . . . . . . . . . Table 803.1.2(1),
Table 803.1.2(2),
Table 803.2(1),
Table 803.2(2) VIBRATION ISOLATORS . . . . . . . . . . . . . . . . . 602.7, 1001.5 VOLUME DAMPERS
Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.0
– W – WALL
Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 907.0 Furnace, vented, definition . . . . . . . . . . . . . . . . . . 224.0 Heater, definition. . . . . . . . . . . . . . . . . . . . . . . . . . 225.0 Terminations . . . . . . . . . . . . . . . . . . . 510.9.2, 802.6.1.3 WARM AIR FURNACE
Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225.0 Heating systems . . . . . . . . . . . . . . . . . . . . . . . . . . 311.0 Located in under-floor spaces . . . . . . . . . . . . . . . . 607.0 WATER HEATERS
Accepted standards . . . . . . . . . . . . . . . . 1203.2, 1207.3,
Table 1203.2 Drain pans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305.4 Dual purpose . . . . . . . . . . . . . . . . . . . . . 1203.2, 1207.3,
Table 1203.2 For space heating
and cooling . . . . . . . . . . . . . . . . 1203.2, Table 1203.2 Tankless . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1203.3 WELD, CONTINUOUS
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0 Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . .212.0, 1211.12 Pressure Vessels . . . . . . . . . . . . . . . . . . . . . . . . .1003.5 Welded duct connections . . . . . . . . . . . . . . . .510.5.3.2 WORKMANSHIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .309.0
506 2019 CALIFORNIA MECHANICAL CODE
HISTORY NOTE APPENDIX
CALIFORNIA MECHANICAL CODE (TITLE 24, PART 4, CALIFORNIA CODE OF REGULATIONS)
For prior code history, see the History Note Appendix to the California Mechanical Code, 2016 Triennial Edition, effec- tive January 1, 2017.
1. (BSC 03/18, HCD 01/18, DSA-SS 03/18, OSHPD 04/18, SFM 04/18) Adoption by reference of the 2018 Uniform Mechanical Code with necessary amendments to become the 2019 California Mechanical Code, and repeal of the 2015 edition of the Uniform Mechanical Code; effective on January 1, 2020.
2019 CALIFORNIA MECHANICAL CODE 507
508 2019 CALIFORNIA MECHANICAL CODE
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Ask AI about this code▸Contents — California Mechanical Code (Title 24, Part 4)
- Chapter 1 — GENERAL CODE PROVISIONS
- Chapter 2 — DEFINITIONS
- Chapter 3 — GENERAL REGULATIONS
- Chapter 4 — VENTILATION AIR
- Chapter 5 — EXHAUST SYSTEMS
- Chapter 6 — DUCT SYSTEMS
- Chapter 7 — COMBUSTION AIR
- Chapter 8 — CHIMNEYS AND VENTS
- Chapter 9 — INSTALLATION OF SPECIFIC APPLIANCES
- Chapter 10 — BOILERS AND PRESSURE VESSELS
- Chapter 11 — REFRIGERATION
- Chapter 12 — HYDRONICS
- Chapter 13 — FUEL GAS PIPING
- Chapter 14 — PROCESS PIPING
- Chapter 15 — SOLAR ENERGY SYSTEMS
- Chapter 16 — STATIONARY POWER PLANTS
- Chapter 17 — REFERENCED STANDARDS
- Appendix A — RESIDENTIAL PLAN EXAMINER REVIEW FORM FOR HVAC SY…
- Appendix B — PROCEDURES TO BE FOLLOWED TO PLACE GAS EQUIPMENT …
- Appendix C — INSTALLATION AND TESTING OF OIL (LIQUID) FUEL-FIR…
- Appendix D — FUEL SUPPLY: MANUFACTURED/MOBILE HOME PARKS AND R…
- Appendix E — SUSTAINABLE PRACTICES
- Appendix F — SIZING OF VENTING SYSTEMS AND OUTDOOR COMBUSTION …
- Appendix G — EXAMPLE CALCULATION OF OUTDOOR AIR RATE