510.2 Multiple Appliance Vent Table 510.2(1) throughTable 510.2(9).

California Plumbing Code (Title 24, Part 5) · 2019 edition · updated 2026-09-10 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

Venting Table 510.2(1) through Table 510.2(9) shall not be used where obstructions are installed in

509.6.1, and where vents terminate in accordance with Section 509.6.1(2), the outdoor portion of the vent shall be enclosed as required by this paragraph for vents not considered to be exposed to the outdoors, or such venting system shall be engineered. A Type B vent passing through an unventilated enclosure or chase insulated to a value of not less than R-8 shall not be considered to be exposed to the outdoors. Table 510.1.2(3) in combination with Table 510.1.2(6) shall be used for clay-tile-lined exterior masonry chimneys, provided all of the following requirements are met: (1) The vent connector is Type B double wall. (2) The vent connector length is limited to 18 inches per

inch (18 mm/mm) of vent connector diameter.

(2) The vent connector length is limited to 18 inches per

inch (18 mm/mm) of vent connector diameter. (3) The appliance is draft hood-equipped. (4) The input rating is less than the maximum capacity

given in Table 510.1.2(3).

(4) The input rating is less than the maximum capacity

given in Table 510.1.2(3). (5) For a water heater, the outdoor design temperature

shall be not less than 5°F (-15°C).

(5) For a water heater, the outdoor design temperature

shall be not less than 5°F (-15°C). (6) For a space-heating appliance, the input rating is

greater than the minimum capacity given by Table

(6) For a space-heating appliance, the input rating is

greater than the minimum capacity given by Table 510.1.2(6). [NFPA 54:13.1.11] 510.1.11 Corrugated Vent Connector Size. Corrugated vent connectors shall not be smaller than the listed appliance categorized vent diameter, flue collar diameter, or draft hood outlet diameter. [NFPA 54:13.1.12] 510.1.12 Upsizing. Vent connectors shall not be upsized more than two sizes exceeding the listed appliance categorized vent diameter, flue collar diameter, or draft hood outlet diameter. [NFPA 54:13.1.13] 510.1.13 Single Run of Vent. In a single run of vent or vent connector, more than one diameter and type shall be permitted to be used, provided that the sizes and types are permitted by the tables. [NFPA 54:13.1.14] 510.1.14 Interpolation. Interpolation shall be permitted in calculating capacities for vent dimensions that fall between table entries. [NFPA 54:13.1.15] 510.1.15 Extrapolation. Extrapolation beyond the table entries shall not be permitted. [NFPA 54:13.1.16] 510.1.16 Engineering Methods. For vent heights lower than 6 feet (1829 mm) and higher than shown in the tables, engineering methods shall be used to calculate vent capacities. [NFPA 54:13.1.17] 510.1.17 Height Entries. Where the actual height of a vent falls between entries in the height column of the applicable table in Table 510.1.2(1) through Table 510.1.2(6), one of the following shall be used: (1) Interpolation. (2) The lower appliance input rating shown in the table

entries for FAN Max and NAT Max column values;

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the venting system. The installation of vents serving listed appliances with vent dampers shall be in accordance with the appliance manufacturer’s instructions or in accordance with the following: (1) The maximum capacity of the vent connector shall be

determined using the NAT Max column.

(1) The maximum capacity of the vent connector shall be

determined using the NAT Max column. (2) The maximum capacity of the vertical vent or chimney

shall be determined using the FAN + NAT column when

utilizing the shortest possible route. Connectors with longer horizontal lengths than those listed in Table 510.2.1 are permitted under the following conditions: (1) The maximum capacity (FAN Max or NAT Max) of

the vent connector shall be reduced 10 percent for

(2) The maximum capacity of the vertical vent or chimney

shall be determined using the FAN + NAT column when the second appliance is a fan-assisted appliance, or the NAT + NAT column when the second appliance is equipped with a draft hood. (3) The minimum capacity shall be determined as if the

appliance were a fan-assisted appliance, as follows:

The minimum capacity shall be determined as if the

appliance were a fan-assisted appliance, as follows: (a) The minimum capacity of the vent connector shall

be determined using the FAN Min column.

(a) The minimum capacity of the vent connector shall

be determined using the FAN Min column. (b) The FAN + FAN column shall be used when the sec ond appliance is a fan-assisted appliance, and the

(b) The FAN + FAN column shall be used when the sec ond appliance is a fan-assisted appliance, and the FAN + NAT column shall be used when the second appliance is equipped with a draft hood, to determine whether the vertical vent or chimney configuration is not permitted (NA). Where the vent configuration is NA, the vent configuration shall not be permitted and an alternative venting configuration shall be utilized. [NFPA 54:13.2.1] 510.2.1 Vent Connector Maximum Length. The maximum vent connector horizontal length shall be 18 inches per inch (18 mm/mm) of connector diameter as shown in Table 510.2.1, or as permitted by Section 510.2.2. [NFPA 54:13.2.2]

(1) The maximum capacity (FAN Max or NAT Max) of

the vent connector shall be reduced 10 percent for each additional multiple of the length listed in Table 510.2.1. For example, the maximum length listed for a 4 inch (100 mm) connector is 6 feet (1829 mm). With a connector length greater than 6 feet (1829 mm) but not exceeding 12 feet (3658 mm), the maximum capacity must be reduced by 10 percent (0.90 x maximum vent connector capacity). With a connector length greater than 12 feet (3658 mm) but not exceeding 18 feet (5486 mm), the maximum capacity shall be reduced by 20 percent (0.80 x maximum vent capacity). (2) For a connector serving a fan-assisted appliance, the

length greater than 6 feet (1829 mm) but not exceeding 12 feet (3658 mm), the maximum capacity must be reduced by 10 percent (0.90 x maximum vent connector capacity). With a connector length greater than 12 feet (3658 mm) but not exceeding 18 feet (5486 mm), the maximum capacity shall be reduced by 20 percent (0.80 x maximum vent capacity). (2) For a connector serving a fan-assisted appliance, the

minimum capacity (FAN Min) of the connector shall

TABLE 510.2.1 VENT CONNECTOR MAXIMUM LENGTH

[NFPA 54: TABLE 13.2.2]

CONNECTOR DIAMETER (inches)	MAXIMUM CONNECTOR HORIZONTAL LENGTH (feet)
	12

	12

	12

	12

Length.510.2.2 Vent Connector Exceeding Maximum The vent connector shall be routed to the vent

(2) For a connector serving a fan-assisted appliance, the

minimum capacity (FAN Min) of the connector shall be determined by referring to the corresponding single appliance table. For Type B double-wall connectors, Table 510.1.2(1) shall be used. For single-wall connectors, Table 510.1.2(2) shall be used. The height (H) and lateral (L) shall be measured according to the procedures for a single appliance vent, as if the other appliances were not present. [NFPA 54:13.2.3] 510.2.3 Vent Connector Manifold. Where the vent connectors are combined prior to entering the vertical portion of the common vent to form a common vent manifold, the size of the common vent manifold and the common vent shall be determined by applying a 10 percent reduction (0.90 x maximum common vent capacity) to the common vent capacity part of the common vent tables. The length of the common vent manifold ( LM ) shall not exceed 18 inches per inch (18 mm/mm) of common vent diameter ( D ). [NFPA 54:13.2.4] 510.2.4 Vent Offset. Where the common vertical vent is offset, the maximum capacity of the common vent shall be reduced in accordance with Section 510.2.5, and the horizontal length of the common vent offset shall not exceed 18 inches per inch (18 mm/mm) of common vent diameter ( D ). Where multiple offsets occur in a common vent, the total horizontal length of offsets combined shall not exceed 18 inches per inch (18 mm/mm) of the common vent diameter. [NFPA 54:13.2.5] 510.2.5 Elbow Reduction. For each elbow up to and including 45 degrees (0.79 rad) in the common vent, the maximum common vent capacity listed in the venting tables shall be reduced by 5 percent. For each elbow exceeding 45 degrees (0.79 rad) up to and including 90 degrees (1.57 rad), the maximum common vent capacity listed in the venting tables shall be reduced by 10 percent. [NFPA 54:13.2.6] 510.2.6 Elbows in Connectors. The vent connector capacities listed in the common vent sizing tables include allowance for two 90 degree (1.57 rad) elbows. For each additional elbow up to and including 45 degrees (0.79 rad), the maximum vent connector capacity listed in the

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diameter of the segment in which the offset is located. (3) For the segment of the common vertical vent con taining the offset, the common vent capacity listed in

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(3) For the segment of the common vertical vent con taining the offset, the common vent capacity listed in the common venting tables shall be reduced by 20 percent (0.80 x maximum common vent capacity). (4) A multistory common vent shall not be reduced in

size above the offset. [NFPA 54:13.2.17]

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venting tables shall be reduced by 5 percent. For each elbow greater than 45 degrees (0.79 rad) up to and including 90 degrees (1.57 rad), the maximum vent connector capacity listed in the venting tables shall be reduced by 10 percent. [NFPA 54:13.2.7] 510.2.7 Common Vent Minimum Size. The crosssectional area of the common vent shall be equal to or greater than the cross-sectional area of the largest connector. [NFPA 54:13.2.8] 510.2.8 Tee and Wye Fittings. Tee and wye fittings connected to a common gas vent shall be considered as part of the common gas vent and constructed of materials consistent with that of the common gas vent. [NFPA 54:13.2.9] 510.2.9 Size of Fittings. At the point where tee or wye fittings connect to a common gas vent, the opening size of the fitting shall be equal to the size of the common vent. Such fittings shall not be prohibited from having reduced size openings at the point of connection of appliance gas vent connectors. [NFPA 54:13.2.10] 510.2.10 High-Altitude Installations. Sea level input ratings shall be used where determining maximum capacity for high-altitude installation. Actual input (derated for altitude) shall be used for determining minimum capacity for high-altitude installation. [NFPA 54:13.2.11] 510.2.11 Connector Rise. The connector rise ( R ) for each appliance connector shall be measured from the draft hood outlet or flue collar to the centerline where the vent gas streams come together. [NFPA 54:13.2.12] 510.2.12 Vent Height. For multiple appliances located on one floor, the total height ( H ) shall be measured from the highest draft hood outlet or flue collar up to the level of the outlet of the common vent. [NFPA 54:13.2.13] 510.2.13 Multistory Installations. For multistory installations, the total height ( H ) for each segment of the system shall be the vertical distance between the highest draft hood outlet or flue collar entering that segment and the centerline of the next higher interconnection tee.

e highest draft hood outlet or flue collar up to the level of the outlet of the common vent. [NFPA 54:13.2.13] 510.2.13 Multistory Installations. For multistory installations, the total height ( H ) for each segment of the system shall be the vertical distance between the highest draft hood outlet or flue collar entering that segment and the centerline of the next higher interconnection tee.

[NFPA 54:13.2.14] 510.2.14 Size of Vents for Multistory Installa- tions. The size of the lowest connector and of the vertical vent leading to the lowest interconnection of a multistory system shall be in accordance with Table 510.1.2(1) or Table 510.1.2(2) for available total height (H) up to the lowest interconnection. [NFPA 54:13.2.15] 510.2.15 Vent Type Multistory Installations. Where used in multistory systems, vertical common vents shall be Type B double-wall and shall be installed with a listed vent cap. [NFPA 54:13.2.16] 510.2.16 Offsets in Multistory Installations. Offsets in multistory common vent systems shall be limited to a single offset in each system, and systems with an offset shall comply with the following: (1) The offset angle shall not exceed 45 degrees (0.79

rad) from vertical.

(1) The offset angle shall not exceed 45 degrees (0.79

rad) from vertical. (2) The horizontal length of the offset shall not exceed

18 inches per inch (18 mm/mm) of common vent

The horizontal length of the offset shall not exceed

18 inches per inch (18 mm/mm) of common vent

(4) A multistory common vent shall not be reduced in

size above the offset. [NFPA 54:13.2.17] 510.2.17 Vertical Vent Size Limitation. Where two or more appliances are connected to a vertical vent or chimney, the flow area of the largest section of vertical vent or chimney shall not exceed seven times the smallest listed appliance categorized vent areas, flue collar area, or draft hood outlet area unless designed in accordance with approved engineering methods. [NFPA 54:13.2.18] 510.2.18 Multiple Input Ratings. For appliances with more than one input rate, the minimum vent connector capacity (FAN Min) determined from the tables shall be less than the lowest appliance input rating, and the maximum vent connector capacity (FAN Max or NAT Max) determined from the table shall exceed the highest appliance input rating. [NFPA 54:13.2.19] 510.2.19 Corrugated Metallic Chimney LinerReduction. Listed corrugated metallic chimney liner systems in masonry chimneys shall be sized by using Table 510.2(1) or Table 510.2(2) for Type B vents, with the maximum capacity reduced by 20 percent (0.80 x maximum capacity) and the minimum capacity as shown in Table 510.2(1) or Table 510.2(2). Corrugated metallic liner systems installed with bends or offsets shall have their maximum capacity further reduced in accordance with Section 510.2.5 and Section 510.2.6. The 20 percent reduction for corrugated metallic chimney liner systems includes an allowance for one long radius 90 degree (1.57 rad) turn at the bottom of the liner. [NFPA 54:13.2.20] 510.2.20 Chimneys and Vents. Table 510.2(1) through Table 510.2(5) shall be used only for chimneys and vents not exposed to the outdoors below the roof line. A Type B vent or listed chimney lining system passing through an unused masonry chimney flue shall not be considered to be exposed to the outdoors. A Type B vent passing through an unventilated enclosure or chase insulated to a value of not less than R-8 shall not be considered to be exposed to the outdoors. Where vents extend outdoors above the roof more than 5 feet (1524 mm) higher than required by Table 509.6.1, and where vents terminate in accordance with Section 509.6.1(2), the outdoor portion of the vent shall be enclosed as required by this section for vents not considered to be exposed to the outdoors, or such venting system shall be engineered. Table 510.2(6) through Table 510.2(9) shall be used for clay-tile-lined exterior masonry chimneys, provided all the following conditions are met: (1) The vent connector is Type B double-wall. (2) At least one appliance is draft hood-equipped.

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(3) The combined appliance input rating is less than the

maximum capacity given by Table 510.2(6) (for

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(3) The combined appliance input rating is less than the

maximum capacity given by Table 510.2(6) (for NAT + NAT) or Table 510.2(8) (for FAN + NAT). (4) The input rating of each space-heating appliance is

greater than the minimum input rating given by

(2) The lower appliance input rating shown in the table

entries for FAN Max and NAT Max column values;

510.2.27 Height Entries. Where the actual height of a vent falls between entries in the height column of the applicable table in Table 510.2(1) through Table 510.2(9), one of the following shall be used: (1) Interpolation.

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(4) The input rating of each space-heating appliance is

greater than the minimum input rating given by Table 510.2(7) (for NAT + NAT) or Table 510.2(9) (for FAN + NAT). (5) The vent connector sizing is in accordance with

Table 510.2(3). [NFPA 54:13.2.22]

(5) The vent connector sizing is in accordance with

Table 510.2(3). [NFPA 54:13.2.22] 510.2.21 Vent Connector Sizing. Vent connectors shall not be increased more than two sizes greater than the listed appliance categorized vent diameter, flue collar diameter, or draft hood outlet diameter. Vent connectors for draft hood-equipped appliances shall not be smaller than the draft hood outlet diameter. Where a vent connector size(s) determined from the tables for fanassisted appliance(s) is smaller than the flue collar diameter, the use of the smaller size(s) shall be permitted provided that the installation complies with all of the following conditions: (1) Vent connectors for fan-assisted appliance flue col lars 12 inches (300 mm) in diameter or smaller are

The lower appliance input rating shown in the table

entries for FAN Max and NAT Max column values; and the higher appliance input rating for the FAN Min column values. [NFPA 54:13.2.30]

(1) Vent connectors for fan-assisted appliance flue col lars 12 inches (300 mm) in diameter or smaller are not reduced by more than one table size [e.g., 12 inches to 10 inches (300 mm to 250 mm) is a one size reduction] and those larger than 12 inches (300 mm) in diameter are not reduced more than two table sizes [e.g., 24 inches to 20 inches (600 mm to 500 mm) is a two size reduction]. (2) The fan-assisted appliance(s) is common vented

with a draft hood-equipped appliance(s).

(2) The fan-assisted appliance(s) is common vented

with a draft hood-equipped appliance(s). (3) The vent connector has a smooth interior wall.

[NFPA 54:13.2.24]

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(3) The vent connector has a smooth interior wall.

[NFPA 54:13.2.24] 510.2.22 Combination of Pipe Types and Sizes. All combinations of pipe sizes, single-wall metal pipe, and double-wall metal pipe shall be allowed within any connector run(s) or within the common vent, provided ALL of the appropriate tables permit ALL of the desired sizes and types of pipe, as if they were used for the entire length of the subject connector or vent. Where singlewall and Type B double-wall metal pipes are used for vent connectors within the same venting system, the common vent shall be sized using Table 510.2(2) or Table 510.2(4) as appropriate. [NFPA 54:13.2.25] Where a table permits more than one diameter of pipe to 510.2.23 Multiple Connector and Vent Sizes. be used for a connector or vent, the permitted sizes shall be permitted to be used. [NFPA 54:13.2.26] 510.2.24 Interpolation. Interpolation shall be permitted in calculating capacities for vent dimensions that fall between table entries. [NFPA 54:13.2.27] 510.2.25 Extrapolation. Extrapolation beyond the table entries shall not be permitted. [NFPA 54:13.2.28] 510.2.26 Engineering Methods. For vent heights lower than 6 feet (1829 mm) and higher than shown in the tables, engineering methods shall be used to calculate vent capacities. [NFPA 54:13.2.29]

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FIGURE 510.1.10 RANGE OF WINTER DESIGN TEMPERATURES USED IN ANALYZING EXTERIOR MASONRY CHIMNEYS IN THE UNITED STATES

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[NFPA 54: FIGURE F.2.4]

FIGURE 510.1.10 RANGE OF WINTER DESIGN TEMPERATURES USED IN ANALYZING EXTERIOR MASONRY CHIMNEYS IN THE UNITED STATES

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TABLE 510.1.2(1) TYPE B DOUBLE-WALL GAS VENT [NFPA					54: TABLE 13.1(a)]*
					NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	SINGLE	SINGLE	SINGLE	SINGLE	SINGLE	SINGLE
					APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
					APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT
		VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)
		3	3	3	4	4	4	5	5	5	6	6	6	7	7	7
		APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
HEIGHT H (feet)	LATERAL L (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
HEIGHT H (feet)	LATERAL L (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	0 2 4 6	0 13 21 25	78 51 49 46	46 36 34 32	0 18 30 36	~~152~~ 97 94 91	86 67 64 61	0 27 39 47	~~251~~ 157 153 149	~~141~~ 105 103 100	0 32 50 59	~~375~~ 232 227 223	~~205~~ 157 153 149	0 44 66 78	~~524~~ 321 316 310	~~285~~ 217 211 205
8	0 2 5 8	0 12 23 28	84 57 53 49	50 40 38 35	0 16 32 39	~~165~~ 109 103 98	94 75 71 66	0 25 42 51	~~276~~ 178 171 164	~~155~~ 120 115 109	0 28 53 64	~~415~~ 263 255 247	~~235~~ 180 173 165	0 42 70 84	~~583~~ 365 356 347	~~320~~ 247 237 227
10	0 2 5 10	0 12 23 30	88 61 57 51	53 42 40 36	0 17 32 41	~~175~~ 118 113 104	~~100~~ 81 77 70	0 23 41 54	~~295~~ 194 187 176	~~166~~ 129 124 115	0 26 52 67	~~447~~ 289 280 267	~~255~~ 195 188 175	0 40 68 88	~~631~~ 402 392 376	~~345~~ 273 263 245
15	0 2 5 10 15	0 11 22 29 35	94 69 65 59 53	58 48 45 41 37	0 15 30 40 48	~~191~~ 136 130 121 112	~~112~~ 93 87 82 76	0 20 39 51 61	~~327~~ 226 219 206 195	~~187~~ 150 142 135 128	0 22 49 64 76	~~502~~ 339 330 315 301	~~285~~ 225 217 208 198	0 38 64 84 98	~~716~~ 475 463 445 429	~~390~~ 316 300 288 275

TABLE 510.1.2(1) TYPE B DOUBLE-WALL GAS VENT [NFPA					54: TABLE 13.1(a)]*
20	0 2 5 10 15 20	0 10 21 28 34 48	97 75 71 64 58 52	61 51 48 44 40 35	0 14 29 38 46 55	~~202~~ 149 143 133 124 116	~~119~~ 100 96 89 84 78	0 18 38 50 59 69	~~349~~ 250 242 229 217 206	~~202~~ 166 160 150 142 134	0 20 47 62 73 84	~~540~~ 377 367 351 337 322	~~307~~ 249 241 228 217 206	0 33 62 81 94 107	~~776~~ 531 519 499 481 464	~~430~~ 346 337 321 308 295
30	0 2 5 10 15 20 30	0 9 21 27 33 56 NA	~~100~~ 81 77 70 64 58 NA	64 56 54 50 NA NA NA	0 13 28 37 44 53 73	~~213~~ 166 160 150 141 132 113	~~128~~ 112 108 102 96 90 NA	0 14 36 48 57 66 88	~~374~~ 283 275 262 249 237 214	~~220~~ 185 176 171 163 154 NA	0 18 45 59 70 80 104	~~587~~ 432 421 405 389 374 346	~~336~~ 280 273 261 249 237 219	0 27 58 77 90 102 131	~~853~~ 613 600 580 560 542 507	~~475~~ 394 385 371 357 343 321
50	0 2 5 10 15 20 30	0 8 20 26 59 NA NA	~~101~~ 86 82 76 70 NA NA	67 61 NA NA NA NA NA	0 11 27 35 42 50 69	~~216~~ 183 177 168 158 149 131	~~134~~ 122 119 114 NA NA NA	0 14 35 45 54 63 84	~~397~~ 320 312 299 287 275 250	~~232~~ 206 200 190 180 169 NA	0 15 43 56 66 76 99	~~633~~ 497 487 471 455 440 410	~~363~~ 314 308 298 288 278 259	0 22 55 73 85 97 123	~~932~~ 715 702 681 662 642 605	~~518~~ 445 438 426 413 401 376
~~100~~	0 2 5 10 15 20 30 50	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	0 10 26 33 40 47 NA NA	~~218~~ 194 189 182 174 166 NA NA	NA NA NA NA NA NA NA NA	0 12 33 43 50 59 78 NA	~~407~~ 354 347 335 321 311 290 NA	NA NA NA NA NA NA NA NA	0 13 40 53 62 71 92 147	~~665~~ 566 557 542 528 513 483 428	~~400~~ 375 369 361 353 344 NA NA	0 18 52 68 80 90 115 180	~~997~~ 831 820 801 782 763 726 651	~~560~~ 510 504 493 482 471 449 405

NA: Not applicable.
NA: Not applicable.

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TABLE 510.1.2(1) TYPE B DOUBLE-WALL GAS VENT [NFPA					54: TABLE 13.1(a)] (continued)
					NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	SINGLE	SINGLE	SINGLE	SINGLE	SINGLE	SINGLE
					APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
					APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT
		VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)
		8	8	8	9	9	9	10	10	10	12	12	12	14	14	14
		APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
HEIGHT H (feet)	LATERAL L (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
HEIGHT H (feet)	LATERAL L (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	0 2 4 6	0 53 79 93	~~698~~ 425 419 413	~~370~~ 285 279 273	0 63 93 110	~~897~~ 543 536 530	~~470~~ 370 362 354	0 75 110 128	~~1121~~ 675 668 661	~~570~~ 455 445 435	0 103 147 171	~~1645~~ 982 975 967	~~850~~ 650 640 630	0 138 191 219	~~2267~~ 1346 1338 1330	~~1170~~ 890 880 870
8	0 2 5 8	0 50 83 99	~~780~~ 483 473 463	~~415~~ 322 313 303	0 60 99 117	~~1006~~ 619 607 596	~~537~~ 418 407 396	0 71 115 137	~~1261~~ 770 758 746	~~660~~ 515 503 490	0 98 154 180	~~1858~~ 1124 1110 1097	~~970~~ 745 733 720	0 130 199 231	~~2571~~ 1543 1528 1514	~~1320~~ 1020 1010 1000
10	0 2 5 10	0 48 81 104	~~847~~ 533 522 504	~~450~~ 355 346 330	0 57 95 122	~~1096~~ 684 671 651	~~585~~ 457 446 427	0 68 112 142	~~1377~~ 852 839 817	~~720~~ 560 547 525	0 93 149 187	~~2036~~ 1244 1229 1204	~~1060~~ 850 829 795	0 124 192 238	~~2825~~ 1713 1696 1669	~~1450~~ 1130 1105 1080
15	0 2 5 10 15	0 45 76 99 115	~~970~~ 633 620 600 580	~~525~~ 414 403 386 373	0 53 90 116 134	~~1263~~ 815 800 777 755	~~682~~ 544 529 507 491	0 63 105 135 155	~~1596~~ 1019 1003 977 953	~~840~~ 675 660 635 610	0 86 140 177 202	~~2380~~ 1495 1476 1446 1418	~~1240~~ 985 967 936 905	0 114 182 227 257	~~3323~~ 2062 2041 2009 1976	~~1720~~ 1350 1327 1289 1250

TABLE 510.1.2(1) TYPE B DOUBLE-WALL GAS VENT [NFPA					54: TABLE 13.1(a)] (continued)
20	0 2 5 10 15 20	0 41 73 95 111 125	~~1057~~ 711 697 675 654 634	~~575~~ 470 460 443 427 410	0 50 86 112 129 145	~~1384~~ 917 902 877 853 830	~~752~~ 612 599 576 557 537	0 59 101 130 150 167	~~1756~~ 1150 1133 1105 1078 1052	~~930~~ 755 738 710 688 665	0 81 135 172 195 217	~~2637~~ 1694 1674 1641 1609 1578	~~1350~~ 1100 1079 1045 1018 990	0 107 174 220 248 273	~~3701~~ 2343 2320 2282 2245 2210	~~1900~~ 1520 1498 1460 1425 1390
30	0 2 5 10 15 20 30	0 33 69 91 105 119 149	~~1173~~ 826 811 788 765 743 702	~~650~~ 535 524 507 490 473 444	0 42 82 107 124 139 171	~~1548~~ 1072 1055 1028 1002 977 929	~~855~~ 700 688 668 648 628 594	0 54 96 125 143 160 195	~~1977~~ 1351 1332 1301 1272 1243 1189	~~1060~~ 865 851 829 807 784 745	0 74 127 164 187 207 246	~~3004~~ 2004 1981 1944 1908 1873 1807	~~1550~~ 1310 1289 1254 1220 1185 1130	0 98 164 209 237 260 305	~~4252~~ 2786 2759 2716 2674 2633 2555	~~2170~~ 1800 1775 1733 1692 1650 1585
50	0 2 5 10 15 20 30	0 26 65 86 100 113 141	~~1297~~ 975 960 935 911 888 844	~~708~~ 615 605 589 572 556 522	0 33 77 101 117 131 161	~~1730~~ 1276 1259 1230 1203 1176 1125	~~952~~ 813 798 773 747 722 670	0 41 90 118 136 151 183	~~2231~~ 1620 1600 1567 1536 1505 1446	~~1195~~ 1010 996 972 948 924 876	0 66 118 154 177 195 232	~~3441~~ 2431 2406 2366 2327 2288 2214	~~1825~~ 1513 1495 1466 1437 1408 1349	0 86 151 196 222 244 287	~~4934~~ 3409 3380 3332 3285 3239 3150	~~2550~~ 2125 2102 2064 2026 1987 1910
~~100~~	0 2 5 10 15 20 30 50	0 21 60 80 93 105 131 197	~~1411~~ 1155 1141 1118 1095 1073 1029 944	~~770~~ 700 692 679 666 653 627 575	0 25 71 94 109 122 149 217	~~1908~~ 1536 1519 1492 1465 1438 1387 1288	~~1040~~ 935 926 910 895 880 849 787	0 30 82 108 126 141 170 241	~~2491~~ 1975 1955 1923 1892 1861 1802 1688	~~1310~~ 1170 1159 1142 1124 1107 1071 1000	0 44 107 142 163 181 215 292	~~3925~~ 3027 3002 2961 2920 2880 2803 2657	~~2050~~ 1820 1803 1775 1747 1719 1663 1550	0 72 136 180 206 226 265 350	~~5729~~ 4313 4282 4231 4182 4133 4037 3856	~~2950~~ 2550 2531 2500 2469 2438 2375 2250

2019 CALIFORNIA PLUMBING CODE 109

WATER HEATERS any other purpose or distributed to any other persons or parti es.

TABLE 510.1.2(1) TYPE B DOUBLE-WALL GAS VENT [NFPA 54: TABLE 13.1(a)] (continued)

					NUMBER OF APPLIANCES:						SINGLE
					APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
					APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT	CONNECTED DIRECTLY TO VENT
		VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)
		16	16	16	18	18	18	20	20	20	22	22	22	24	24	24
		APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
HEIGHT H (feet)	LATERAL L (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
HEIGHT H (feet)	LATERAL L (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	0 2 4 6	0 178 242 276	2983 1769 1761 1753	1530 1170 1160 1150	0 225 300 341	3802 2250 2242 2235	1960 1480 1475 1470	0 296 390 437	4721 2782 2774 2767	2430 1850 1835 1820	0 360 469 523	5737 3377 3370 3363	2950 2220 2215 2210	0 426 555 618	6853 4030 4023 4017	3520 2670 2660 2650
8	0 2 5 8	0 168 251 289	3399 2030 2013 2000	1740 1340 1330 1320	0 212 311 354	4333 2584 2563 2552	2220 1700 1685 1670	0 278 398 450	5387 3196 3180 3163	2750 2110 2090 2070	0 336 476 537	6555 3882 3863 3850	3360 2560 2545 2530	0 401 562 630	7838 4634 4612 4602	4010 3050 3040 3030
10	0 2 5 10	0 161 243 298	3742 2256 2238 2209	1925 1480 1461 1430	0 202 300 364	4782 2868 2849 2818	2450 1890 1871 1840	0 264 382 459	5955 3556 3536 3504	3050 2340 2318 2280	0 319 458 546	7254 4322 4301 4268	3710 2840 2818 2780	0 378 540 641	8682 5153 5132 5099	4450 3390 3371 3340
15	0 2 5 10 15	0 147 229 283 318	4423 2719 2696 2659 2623	2270 1770 1748 1712 1675	0 186 283 346 385	5678 3467 3442 3402 3363	2900 2260 2235 2193 2150	0 239 355 432 479	7099 4304 4278 4234 4192	3620 2800 2777 2739 2700	0 290 426 510 564	8665 5232 5204 5159 5115	4410 3410 3385 3343 3300	0 346 501 599 665	10 393 6251 6222 6175 6129	5300 4080 4057 4019 3980
20	0 2 5 10 15 20	0 139 219 273 306 335	4948 3097 3071 3029 2988 2948	2520 2000 1978 1940 1910 1880	0 175 270 334 372 404	6376 3955 3926 3880 3835 3791	3250 2570 2544 2500 2465 2430	0 220 337 413 459 495	7988 4916 4885 4835 4786 4737	4060 3200 3174 3130 3090 3050	0 269 403 489 541 585	9785 5983 5950 5896 5844 5792	4980 3910 3880 3830 3795 3760	0 321 475 573 631 689	11 753 7154 7119 7063 7007 6953	6000 4700 4662 4600 4575 4550

					NUMBER OF APPLIANCES:						SINGLE
30	0 2 5 10 15 20 30	0 127 206 259 292 319 369	5725 3696 3666 3617 3570 3523 3433	2920 2380 2350 2300 2250 2200 2130	0 159 252 316 354 384 440	7420 4734 4701 4647 4594 4542 4442	3770 3050 3020 2970 2920 2870 2785	0 199 312 386 431 467 540	9341 5900 5863 5803 5744 5686 5574	4750 3810 3783 3739 3695 3650 3565	0 241 373 456 507 548 635	11 483 7194 7155 7090 7026 6964 6842	5850 4650 4622 4574 4527 4480 4375	0 285 439 535 590 639 739	13 848 8617 8574 8505 8437 8370 8239	7060 5600 5552 5471 5391 5310 5225
50	0 2 5 10 15 20 30	0 113 191 243 274 300 347	6711 4554 4520 4464 4409 4356 4253	3440 2840 2813 2767 2721 2675 2631	0 141 234 295 330 361 412	8774 5864 5826 5763 5701 5641 5523	4460 3670 3639 3585 3534 3481 3431	0 171 283 355 396 433 494	11 129 7339 7295 7224 7155 7086 6953	5635 4630 4597 4542 4511 4479 4421	0 209 336 419 465 506 577	13 767 8980 8933 8855 8779 8704 8557	6940 5695 5654 5585 5546 5506 5444	0 251 394 491 542 586 672	16 694 10 788 10 737 10 652 10 570 10 488 10 328	8430 6860 6818 6749 6710 6670 6603
100	0 2 5 10 15 20 30 50	0 95 172 223 252 277 319 415	7914 5834 5797 5737 5678 5619 5505 5289	4050 3500 3475 3434 3392 3351 3267 3100	0 120 208 268 304 330 378 486	10 485 7591 7548 7478 7409 7341 7209 6956	5300 4600 4566 4509 4451 4394 4279 4050	0 138 245 318 358 387 446 572	13 454 9577 9528 9447 9367 9289 9136 8841	6700 5800 5769 5717 5665 5613 5509 5300	0 169 293 374 418 452 514 659	16 817 11 803 11 748 11 658 11 569 11 482 11 310 10 979	8600 7200 7162 7100 7037 6975 6850 6600	0 204 341 436 487 523 592 752	20 578 14 264 14 204 14 105 14 007 13 910 13 720 13 354	10 300 8800 8756 8683 8610 8537 8391 8100

110 2019 CALIFORNIA PLUMBING CODE

WATER HEATERS

TABLE 510.1.2(2) TYPE B DOUBLE-WALL GAS VENT [NFPA					54: TABLE 13.1(b)]*
					NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	SINGLE	SINGLE	SINGLE	SINGLE	SINGLE	SINGLE
					APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
					APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR
		VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)
		3	3	3	4	4	4	5	5	5	6	6	6	7	7	7
		APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
HEIGHT H (feet)	LATERAL L (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
HEIGHT H (feet)	LATERAL L (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	0 2 4 6	38 39 NA NA	77 51 NA NA	45 36 33 31	59 60 74 83	151 96 92 89	85 66 63 60	85 85 102 114	249 156 152 147	140 104 102 99	126 123 146 163	373 231 225 220	204 156 152 148	165 159 187 207	522 320 313 307	284 213 208 203
8	0 2 5 8	37 39 NA NA	83 56 NA NA	50 39 37 33	58 59 77 90	164 108 102 95	93 75 69 64	83 83 107 122	273 176 168 161	154 119 114 107	123 121 151 175	412 261 252 243	234 179 171 163	161 155 193 223	580 363 352 342	319 246 235 225
10	0 2 5 10	37 39 52 NA	87 61 56 NA	53 41 39 34	57 59 76 97	174 117 111 100	99 80 76 68	82 82 105 132	293 193 185 171	165 128 122 112	120 119 148 188	444 287 277 261	254 194 186 171	158 153 190 237	628 400 388 369	344 272 261 241
15	0 2 5 10 15	36 38 51 NA NA	93 69 63 NA NA	57 47 44 39 NA	56 57 75 95 NA	190 136 128 116 NA	111 93 86 79 72	80 80 102 128 158	325 225 216 201 186	186 149 140 131 124	116 115 144 182 220	499 337 326 308 290	283 224 217 203 192	153 148 182 228 272	713 473 459 438 418	388 314 298 284 269
20	0 2 5 10 15 20	35 37 50 NA NA NA	96 74 68 NA NA NA	60 50 47 41 NA NA	54 56 73 93 NA NA	200 148 140 129 NA NA	118 99 94 86 80 NA	78 78 100 125 155 186	346 248 239 223 208 192	201 165 158 146 136 126	114 113 141 177 216 254	537 375 363 344 325 306	306 248 239 224 210 196	149 144 178 222 264 309	772 528 514 491 469 448	428 344 334 316 301 285

TABLE 510.1.2(2) TYPE B DOUBLE-WALL GAS VENT [NFPA					54: TABLE 13.1(b)]*
30	0 2 5 10 15 20 30	34 37 49 NA NA NA NA	99 80 74 NA NA NA NA	63 56 52 NA NA NA NA	53 55 72 91 115 NA NA	211 164 157 144 131 NA NA	127 111 106 98 NA NA NA	76 76 98 122 151 181 NA	372 281 271 255 239 223 NA	219 183 173 168 157 NA NA	110 109 136 171 208 246 NA	584 429 417 397 377 357 NA	334 279 271 257 242 228 NA	144 139 171 213 255 298 389	849 610 595 570 547 524 477	472 392 382 367 349 333 305
50	0 2 5 10 15 20 30	33 36 48 NA NA NA NA	99 84 80 NA NA NA NA	66 61 NA NA NA NA NA	51 53 70 89 112 NA NA	213 181 174 160 148 NA NA	133 121 117 NA NA NA NA	73 73 94 118 145 176 NA	394 318 308 292 275 257 NA	230 205 198 186 174 NA NA	105 104 131 162 199 236 315	629 495 482 461 441 420 376	361 312 305 292 280 267 NA	138 133 164 203 244 285 373	928 712 696 671 646 622 573	515 443 435 420 405 389 NA
100	0 2 5 10 15 20 30 50	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	49 51 67 85 132 NA NA NA	214 192 186 175 162 NA NA NA	NA NA NA NA NA NA NA NA	69 70 90 113 138 168 231 NA	403 351 342 324 310 295 264 NA	NA NA NA NA NA NA NA NA	100 98 125 153 188 224 301 NA	659 563 551 532 511 487 448 NA	395 373 366 354 343 NA NA NA	131 125 156 191 230 270 355 540	991 828 813 789 764 739 685 584	555 508 501 486 473 458 NA NA

NA: Not applicable.
NA: Not applicable.

2019 CALIFORNIA PLUMBING CODE 111

WATER HEATERS any other purpose or distributed to any other persons or parti es.

TABLE 510.1.2(2) TYPE B DOUBLE-WALL GAS VENT [NFPA 54: TABLE 13.1(b)] (continued)*

				NUMBER OF APPLIANCES:					SINGLE
				APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
				APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR
		VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)	VENT DIAMETER – D (inch)
		8	8	8	9	9	9	10	10	10	12	12	12
		APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
HEIGHT H (feet)	LATERAL L (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
HEIGHT H (feet)	LATERAL L (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	0 2 4 6	211 201 237 263	695 423 416 409	369 284 277 271	267 251 295 327	894 541 533 526	469 368 360 352	371 347 409 449	1118 673 664 656	569 453 443 433	537 498 584 638	1639 979 971 962	849 648 638 627
8	0 2 5 8	206 197 245 280	777 482 470 458	414 321 311 300	258 246 305 344	1002 617 604 591	536 417 404 392	360 339 418 470	1257 768 754 740	658 513 500 486	521 486 598 665	1852 1120 1104 1089	967 743 730 715
10	0 2 5 10	202 193 241 296	844 531 518 497	449 354 344 325	253 242 299 363	1093 681 667 643	584 456 443 423	351 332 409 492	1373 849 834 808	718 559 544 520	507 475 584 688	2031 1242 1224 1194	1057 848 825 788
15	0 2 5 10 15	195 187 231 284 334	966 631 616 592 568	523 413 400 381 367	244 232 287 349 404	1259 812 795 768 742	681 543 526 501 484	336 319 392 470 540	1591 1015 997 966 937	838 673 657 628 601	488 457 562 664 750	2374 1491 1469 1433 1399	1237 983 963 928 894
20	0 2 5 10 15 20	190 182 224 277 325 374	1053 708 692 666 640 616	573 468 457 437 419 400	238 227 279 339 393 448	1379 914 896 866 838 810	750 611 596 570 549 526	326 309 381 457 526 592	1751 1146 1126 1092 1060 1028	927 754 734 702 677 651	473 443 547 646 730 808	2631 1689 1665 1626 1587 1550	1346 1098 1074 1037 1005 973
30	0 2 5 10 15 20 30	184 175 215 265 312 360 461	1168 823 806 777 750 723 670	647 533 521 501 481 461 426	229 219 269 327 379 433 541	1542 1069 1049 1017 985 955 895	852 698 684 662 638 615 574	312 296 366 440 507 570 704	1971 1346 1324 1287 1251 1216 1147	1056 863 846 821 794 768 720	454 424 524 620 702 780 937	2996 1999 1971 1927 1884 1841 1759	1545 1308 1283 1243 1205 1166 1101

				NUMBER OF APPLIANCES:					SINGLE
50	0 2 5 10 15 20 30	176 168 204 253 299 345 442	1292 971 953 923 894 866 809	704 613 602 583 562 543 502	220 209 257 313 363 415 521	1724 1273 1252 1217 1183 1150 1086	948 811 795 765 736 708 649	295 280 347 418 481 544 674	2223 1615 1591 1551 1512 1473 1399	1189 1007 991 963 934 906 848	428 401 496 589 668 741 892	3432 2426 2396 2347 2299 2251 2159	1818 1509 1490 1455 1421 1387 1318
100	0 2 5 10 15 20 30 50	166 158 194 238 281 325 418 617	1404 1152 1134 1104 1075 1046 988 866	765 698 688 672 656 639 NA NA	207 196 240 293 342 391 491 711	1900 1532 1511 1477 1443 1410 1343 1205	1033 933 921 902 884 864 824 NA	273 259 322 389 447 507 631 895	2479 1970 1945 1905 1865 1825 1747 1591	1300 1168 1153 1133 1110 1087 1041 NA	395 371 460 547 618 690 834 1138	3912 3021 2990 2938 2888 2838 2739 2547	2042 1817 1796 1763 1730 1696 1627 1489

NA: Not applicable.
NA: Not applicable.

112 2019 CALIFORNIA PLUMBING CODE

WATER HEATERS

TABLE 510.1.2(3) MASONRY CHIMNEY [NFPA 54: TABLE 13.1(c)]*

					NUMBER OF APPLIANCES:						SINGLE
					APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
					APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
		TYPE B DOUBLE-WALL CONNECTOR DIAMETER – D (inch) TO BE USED WITH CHIMNEY AREAS WITHIN THE SIZE LIMITS AT BOTTOM
		3	3	3	4	4	4	5	5	5	6	6	6	7	7	7
		APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
HEIGHT H (feet)	LATERAL L (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
HEIGHT H (feet)	LATERAL L (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	2 5	NA NA	NA NA	28 25	NA NA	NA NA	52 49	NA NA	NA NA	86 82	NA NA	NA NA	~~130~~ 117	NA NA	NA NA	~~180~~ 165
8	2 5 8	NA NA NA	NA NA NA	29 26 24	NA NA NA	NA NA NA	55 52 48	NA NA NA	NA NA NA	93 88 83	NA NA NA	NA NA NA	~~145~~ 134 127	NA NA NA	NA NA NA	~~198~~ 183 175
10	2 5 10	NA NA NA	NA NA NA	31 28 25	NA NA NA	NA NA NA	61 57 50	NA NA NA	NA NA NA	~~103~~ 96 87	NA NA NA	NA NA NA	~~162~~ 148 139	NA NA NA	NA NA NA	~~221~~ 204 191
15	2 5 10 15	NA NA NA NA	NA NA NA NA	35 35 28 NA	NA NA NA NA	NA NA NA NA	67 62 55 48	NA NA NA NA	NA NA NA NA	~~114~~ 107 97 89	NA NA NA NA	NA NA NA NA	~~179~~ 164 153 141	53 NA NA NA	~~475~~ NA NA NA	~~250~~ 231 216 201

					NUMBER OF APPLIANCES:						SINGLE
20	2 5 10 15 20	NA NA NA NA NA	NA NA NA NA NA	38 36 NA NA NA	NA NA NA NA NA	NA NA NA NA NA	74 68 60 NA NA	NA NA NA NA NA	NA NA NA NA NA	~~124~~ 116 107 97 83	NA NA NA NA NA	NA NA NA NA NA	~~201~~ 184 172 159 148	51 80 NA NA NA	~~522~~ 503 NA NA NA	~~274~~ 254 237 220 206
30	2 5 10 15 20 30	NA NA NA NA NA NA	NA NA NA NA NA NA	41 NA NA NA NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	82 76 67 NA NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	~~137~~ 128 115 107 91 NA	NA NA NA NA NA NA	NA NA NA NA NA NA	~~216~~ 198 184 171 159 NA	47 75 NA NA NA NA	~~581~~ 561 NA NA NA NA	~~303~~ 281 263 243 227 188
50	2 5 10 15 20 30	NA NA NA NA NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	92 NA NA NA NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	~~161~~ 151 138 127 NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	~~251~~ 230 215 199 185 NA	NA NA NA NA NA NA	NA NA NA NA NA NA	~~351~~ 323 304 282 264 NA
Minimum internal area of chimney (square inches)	Minimum internal area of chimney (square inches)	12	12	12	19	19	19	28	28	28	38	38	38	50	50	50
Maximum internal area of chimney (square inches)	Maximum internal area of chimney (square inches)	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.

NA: Not applicable.

2019 CALIFORNIA PLUMBING CODE 113

WATER HEATERS any other purpose or distributed to any other persons or parti es.

TABLE 510.1.2(3) MASONRY CHIMNEY [NFPA 54: TABLE 13.1(c)] (continued)*

				NUMBER OF APPLIANCES:					SINGLE
				APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
				APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
		TYPE B DOUBLE-WALL CONNECTOR DIAMETER – D (inch) TO BE USED WITH CHIMNEY AREAS WITHIN THE SIZE LIMITS AT BOTTOM
		8	8	8	9	9	9	10	10	10	12	12	12
		APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
HEIGHT H (feet)	LATERAL L (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
HEIGHT H (feet)	LATERAL L (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	2 5	NA NA	NA NA	247 231	NA NA	NA NA	320 298	NA NA	NA NA	401 376	NA NA	NA NA	581 561
8	2 5 8	NA NA NA	NA NA NA	266 247 239	84 NA NA	590 NA NA	350 328 318	100 149 173	728 711 695	446 423 410	139 201 231	1024 1007 990	651 640 623
10	2 5 10	68 NA NA	519 NA NA	298 277 263	82 124 155	655 638 610	388 365 347	98 146 182	810 791 762	491 466 444	136 196 240	1144 1124 1093	724 712 668
15	2 5 10 15	64 99 126 NA	613 594 565 NA	336 313 296 281	77 118 148 171	779 759 727 698	441 416 394 375	92 139 173 198	968 946 912 880	562 533 567 485	127 186 229 259	1376 1352 1315 1280	841 828 777 742
20	2 5 10 15 20	61 95 122 NA NA	678 658 627 NA NA	375 350 332 314 296	73 113 143 165 186	867 845 811 780 750	491 463 440 418 397	87 133 167 191 214	1083 1059 1022 987 955	627 597 566 541 513	121 179 221 251 277	1548 1523 1482 1443 1406	953 933 879 840 807
30	2 5 10 15 20 30	57 90 115 NA NA NA	762 741 709 NA NA NA	421 393 373 353 332 288	68 106 135 156 176 NA	985 962 927 893 860 NA	558 526 500 476 450 416	81 125 158 181 203 249	1240 1216 1176 1139 1103 1035	717 683 648 621 592 555	111 169 210 239 264 318	1793 1766 1721 1679 1638 1560	1112 1094 1025 981 940 877

				NUMBER OF APPLIANCES:					SINGLE
50	2 5 10 15 20 30	51 83 NA NA NA NA	840 819 NA NA NA NA	477 445 424 400 376 327	61 98 126 146 165 NA	1106 1083 1047 1010 977 NA	633 596 567 539 511 468	72 116 147 170 190 233	1413 1387 1347 1307 1269 1196	812 774 733 702 669 623	99 155 195 222 246 295	2080 2052 2006 1961 1916 1832	1243 1225 1147 1099 1050 984
Minimum internal area of chimney (square inches)	Minimum internal area of chimney (square inches)	63	63	63	78	78	78	95	95	95	132	132	132
Maximum internal area of chimney (square inches)	Maximum internal area of chimney (square inches)	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.

NA: Not applicable.
NA: Not applicable.

114 2019 CALIFORNIA PLUMBING CODE

WATER HEATERS

TABLE 510.1.2(4) MASONRY CHIMNEY [NFPA 54: TABLE 13.1(d)]*

					NUMBER OF APPLIANCES:						SINGLE
					APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
					APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR
		SINGLE-WALL METAL CONNECTOR DIAMETER– D (inch) TO BE USED WITH CHIMNEY AREAS WITHIN THE SIZE LIMITS AT BOTTOM
		3	3	3	4	4	4	5	5	5	6	6	6	7	7	7
		APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
HEIGHT H (feet)	LATERAL L (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
HEIGHT H (feet)	LATERAL L (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	2 5	NA NA	NA NA	28 25	NA NA	NA NA	52 48	NA NA	NA NA	86 81	NA NA	NA NA	~~130~~ 116	NA NA	NA NA	~~180~~ 164
8	2 5 8	NA NA NA	NA NA NA	29 26 23	NA NA NA	NA NA NA	55 51 47	NA NA NA	NA NA NA	93 87 82	NA NA NA	NA NA NA	~~145~~ 133 126	NA NA NA	NA NA NA	~~197~~ 182 174
10	2 5 10	NA NA NA	NA NA NA	31 28 24	NA NA NA	NA NA NA	61 56 49	NA NA NA	NA NA NA	~~102~~ 95 86	NA NA NA	NA NA NA	~~161~~ 147 137	NA NA NA	NA NA NA	~~220~~ 203 189
15	2 5 10 15	NA NA NA NA	NA NA NA NA	35 32 27 NA	NA NA NA NA	NA NA NA NA	67 61 54 46	NA NA NA NA	NA NA NA NA	~~113~~ 106 96 87	NA NA NA NA	NA NA NA NA	~~178~~ 163 151 138	~~166~~ NA NA NA	~~473~~ NA NA NA	~~249~~ 230 214 198

					NUMBER OF APPLIANCES:						SINGLE
20	2 5 10 15 20	NA NA NA NA NA	NA NA NA NA NA	38 35 NA NA NA	NA NA NA NA NA	NA NA NA NA NA	73 67 59 NA NA	NA NA NA NA NA	NA NA NA NA NA	~~123~~ 115 105 95 80	NA NA NA NA NA	NA NA NA NA NA	~~200~~ 183 170 156 144	~~163~~ NA NA NA NA	~~520~~ NA NA NA NA	~~273~~ 252 235 217 202
30	2 5 10 15 20 30	NA NA NA NA NA NA	NA NA NA NA NA NA	41 NA NA NA NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	81 75 66 NA NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	~~136~~ 127 113 105 88 NA	NA NA NA NA NA NA	NA NA NA NA NA NA	~~215~~ 196 182 168 155 NA	~~158~~ NA NA NA NA NA	~~578~~ NA NA NA NA NA	~~302~~ 279 260 240 223 182
50	2 5 10 15 20 30	NA NA NA NA NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	91 NA NA NA NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	~~160~~ 149 136 124 NA NA	NA NA NA NA NA NA	NA NA NA NA NA NA	~~250~~ 228 212 195 180 NA	NA NA NA NA NA NA	NA NA NA NA NA NA	~~350~~ 321 301 278 258 NA
~~Minimum~~ internal area of chimney (square inches)	~~Minimum~~ internal area of chimney (square inches)	12	12	12	19	19	19	28	28	28	38	38	38	50	50	50
~~Maximum~~ internal area of chimney (square inches)	~~Maximum~~ internal area of chimney (square inches)	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.

NA: Not applicable.
NA: Not applicable.

2019 CALIFORNIA PLUMBING CODE 115

WATER HEATERS any other purpose or distributed to any other persons or parti es.

TABLE 510.1.2(4) MASONRY CHIMNEY [NFPA 54: TABLE 13.1(d)] (continued)*

				NUMBER OF APPLIANCES:					SINGLE
				APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
				APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR
		SINGLE-WALL METAL CONNECTOR DIAMETER – D (inch) TO BE USED WITH CHIMNEY AREAS WITHIN THE SIZE LIMITS AT BOTTOM
		8	8	8	9	9	9	10	10	10	12	12	12
		APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
HEIGHT H (feet)	LATERAL L (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
HEIGHT H (feet)	LATERAL L (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	2 5	NA NA	NA NA	~~247~~ 230	NA NA	NA NA	~~319~~ 297	NA NA	NA NA	~~400~~ 375	NA NA	NA NA	~~580~~ 560
8	2 5 8	NA NA NA	NA NA NA	~~265~~ 246 237	NA NA NA	NA NA NA	~~349~~ 327 317	~~382~~ NA NA	~~725~~ NA NA	~~445~~ 422 408	~~549~~ 673 747	~~1021~~ 1003 985	~~650~~ 638 621
10	2 5 10	~~216~~ NA NA	~~518~~ NA NA	~~297~~ 276 261	~~271~~ 334 NA	~~654~~ 635 NA	~~387~~ 364 345	~~373~~ 459 547	~~808~~ 789 758	~~490~~ 465 441	~~536~~ 657 771	~~1142~~ 1121 1088	~~722~~ 710 665
15	2 5 10 15	~~211~~ 261 NA NA	~~611~~ 591 NA NA	~~335~~ 312 294 278	~~264~~ 325 392 452	~~776~~ 755 722 692	~~440~~ 414 392 372	~~362~~ 444 531 606	~~965~~ 942 907 873	~~560~~ 531 504 481	~~520~~ 637 749 841	~~1373~~ 1348 1309 1272	~~840~~ 825 774 738
20	2 5 10 15 20	~~206~~ 255 312 NA NA	~~675~~ 655 622 NA NA	~~374~~ 348 330 311 292	~~258~~ 317 382 442 NA	~~864~~ 842 806 773 NA	~~490~~ 461 437 414 392	~~252~~ 433 517 591 663	~~1079~~ 1055 1016 979 944	~~625~~ 594 562 539 510	~~508~~ 623 733 823 911	~~1544~~ 1518 1475 1434 1394	~~950~~ 930 875 835 800

				NUMBER OF APPLIANCES:					SINGLE
30	2 5 10 15 20 30	~~200~~ 245 300 NA NA NA	~~759~~ 737 703 NA NA NA	~~420~~ 391 370 349 327 281	~~249~~ 306 370 428 NA NA	~~982~~ 958 920 884 NA NA	~~556~~ 524 496 471 445 408	~~340~~ 417 500 572 643 NA	~~1237~~ 1210 1168 1128 1089 NA	~~715~~ 680 644 615 585 544	~~489~~ 600 708 798 883 1055	~~1789~~ 1760 1713 1668 1624 1539	~~1110~~ 1090 1020 975 932 865
50	2 5 10 15 20 30	~~191~~ NA NA NA NA NA	~~837~~ NA NA NA NA NA	~~475~~ 442 420 395 370 318	~~238~~ 293 355 NA NA NA	~~1103~~ 1078 1038 NA NA NA	~~631~~ 593 562 533 504 458	~~323~~ 398 447 546 616 NA	~~1408~~ 1381 1337 1294 1251 NA	~~810~~ 770 728 695 660 610	~~463~~ 571 674 761 844 1009	~~2076~~ 2044 1994 1945 1898 1805	~~1240~~ 1220 1140 1090 1040 970
~~Minimum~~ internal area of chimney (square inches)	~~Minimum~~ internal area of chimney (square inches)	63	63	63	78	78	78	95	95	95	132	132	132
~~Maximum~~ internal area of chimney (square inches)	~~Maximum~~ internal area of chimney (square inches)	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.	Seven times the listed appliance categorized vent area, flue collar area, or draft hood outlet areas.

NA: Not applicable.
NA: Not applicable.

116 2019 CALIFORNIA PLUMBING CODE

WATER HEATERS

TABLE 510.1.2(5) SINGLE-WALL METAL PIPE OR TYPE B ASBESTOS-CEMENT VENT [NFPA 54: TABLE 13.1(e)]*

				NUMBER OF APPLIANCES:			SINGLE
				APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	DRAFT HOOD-EQUIPPED	DRAFT HOOD-EQUIPPED	DRAFT HOOD-EQUIPPED
				APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	CONNECTED DIRECTLY TO PIPE OR VENT	CONNECTED DIRECTLY TO PIPE OR VENT	CONNECTED DIRECTLY TO PIPE OR VENT
		DIAMETER – D (inch) TO BE USED WITH CHIMNEY AREAS WITHIN THE SIZE LIMITS AT BOTTOM
		3	4	5	6	7	8	10	12
HEIGHT H (feet)	LATERAL L (feet)	APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
HEIGHT H (feet)	LATERAL L (feet)	MAXIMUM APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	MAXIMUM APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	MAXIMUM APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	MAXIMUM APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	MAXIMUM APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	MAXIMUM APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	MAXIMUM APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR	MAXIMUM APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
6	0 2 5	39 31 28	70 55 51	~~116~~ 94 88	~~170~~ 141 128	~~232~~ 194 177	~~312~~ 260 242	~~500~~ 415 390	~~750~~ 620 600
8	0 2 5 10	42 32 29 24	76 61 56 49	~~126~~ 102 95 86	~~185~~ 154 141 131	~~252~~ 210 194 180	~~340~~ 284 264 250	~~542~~ 451 430 406	~~815~~ 680 648 625
10	0 2 5 10 15	45 35 32 27 NA	84 67 61 54 46	~~138~~ 111 104 94 84	~~202~~ 168 153 143 130	~~279~~ 233 215 200 186	~~372~~ 311 289 274 258	~~606~~ 505 480 455 432	~~912~~ 760 724 700 666
15	0 2 5 10 15 20	49 39 35 30 NA NA	91 72 67 58 50 NA	~~151~~ 122 110 103 93 82	~~223~~ 186 170 158 144 132	~~312~~ 260 240 223 207 195	~~420~~ 350 325 308 291 273	~~684~~ 570 540 514 488 466	~~1040~~ 865 825 795 760 726
20	0 2 5 10 15 20	53 42 38 32 NA NA	~~101~~ 80 74 65 55 NA	~~163~~ 136 123 115 104 91	~~252~~ 210 192 178 163 149	~~342~~ 286 264 246 228 214	~~470~~ 392 364 345 326 306	~~770~~ 641 610 571 550 525	~~1190~~ 990 945 910 870 832
30	0 2 5 10 15 20 30	56 44 NA NA NA NA NA	~~108~~ 84 78 68 NA NA NA	~~183~~ 148 137 125 113 99 NA	~~276~~ 230 210 196 177 163 NA	~~384~~ 320 296 274 258 240 192	~~529~~ 441 410 388 366 344 295	~~878~~ 730 694 656 625 596 540	~~1370~~ 1140 1080 1050 1000 960 890
50	0 2 5 10 15 20 30	NA NA NA NA NA NA NA	~~120~~ 95 NA NA NA NA NA	~~210~~ 171 159 146 NA NA NA	~~310~~ 260 234 221 200 185 NA	~~443~~ 370 342 318 292 276 222	~~590~~ 492 474 456 407 384 330	~~980~~ 820 780 730 705 670 605	~~1550~~ 1290 1230 1190 1130 1080 1010

NA: Not applicable.
NA: Not applicable.

2019 CALIFORNIA PLUMBING CODE 117

WATER HEATERS any other purpose or distributed to any other persons or parti es.

TABLE 510.1.2(6) EXTERIOR MASONRY CHIMNEY [NFPA 54: TABLE 13.1(f)] ^{1, 2}

			NUMBER OF APPLIANCES:			SINGLE
			APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	NAT	NAT	NAT
			APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
MINIMUM ALLOWABLE INPUT RATING OF SPACE-HEATING APPLIANCE IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)
VENT HEIGHT H (feet)	12	19	28	38	50	63	78	113
6 8 10 15 20 30 50	~~Local 99% winter design temperature: 37°F or greater~~	~~Local 99% winter design temperature: 37°F or greater~~	~~Local 99% winter design temperature: 37°F or greater~~	~~Local 99% winter design temperature: 37°F or greater~~	~~Local 99% winter design temperature: 37°F or greater~~	~~Local 99% winter design temperature: 37°F or greater~~	~~Local 99% winter design temperature: 37°F or greater~~	~~Local 99% winter design temperature: 37°F or greater~~
6 8 10 15 20 30 50	0 0 0 NA NA NA NA	0 0 0 0 NA NA NA	0 0 0 0 123 NA NA	0 0 0 0 190 NA NA	0 0 0 0 249 NA NA	0 0 0 0 184 393 NA	0 0 0 0 0 334 NA	0 0 0 0 0 0 579
6 8 10 15 20 30 50	~~Local 99% winter design temperature: 27°F to 36°F~~	~~Local 99% winter design temperature: 27°F to 36°F~~	~~Local 99% winter design temperature: 27°F to 36°F~~	~~Local 99% winter design temperature: 27°F to 36°F~~	~~Local 99% winter design temperature: 27°F to 36°F~~	~~Local 99% winter design temperature: 27°F to 36°F~~	~~Local 99% winter design temperature: 27°F to 36°F~~	~~Local 99% winter design temperature: 27°F to 36°F~~
6 8 10 15 20 30 50	0 0 0 NA NA NA NA	0 0 51 NA NA NA NA	68 82 97 NA NA NA NA	~~116~~ 127 141 NA NA NA NA	~~156~~ 167 183 233 NA NA NA	~~180~~ 187 201 253 307 419 NA	~~212~~ 214 225 274 330 445 NA	~~266~~ 263 265 305 362 485 763
6 8 10 15 20 30 50	~~Local 99% winter design temperature: 17°F to 26°F~~	~~Local 99% winter design temperature: 17°F to 26°F~~	~~Local 99% winter design temperature: 17°F to 26°F~~	~~Local 99% winter design temperature: 17°F to 26°F~~	~~Local 99% winter design temperature: 17°F to 26°F~~	~~Local 99% winter design temperature: 17°F to 26°F~~	~~Local 99% winter design temperature: 17°F to 26°F~~	~~Local 99% winter design temperature: 17°F to 26°F~~
6 8 10 15 20 30 50	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	NA 197 214 NA NA NA NA	~~215~~ 226 245 296 352 NA NA	~~259~~ 264 278 331 387 507 NA	~~349~~ 352 358 398 457 581 NA

			NUMBER OF APPLIANCES:			SINGLE
6 8 10 15 20 30 50	~~Local 99% winter design temperature: 5°F to 16°F~~	~~Local 99% winter design temperature: 5°F to 16°F~~	~~Local 99% winter design temperature: 5°F to 16°F~~	~~Local 99% winter design temperature: 5°F to 16°F~~	~~Local 99% winter design temperature: 5°F to 16°F~~	~~Local 99% winter design temperature: 5°F to 16°F~~	~~Local 99% winter design temperature: 5°F to 16°F~~	~~Local 99% winter design temperature: 5°F to 16°F~~
6 8 10 15 20 30 50	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	NA NA 289 NA NA NA NA	NA 312 331 393 450 NA NA	~~416~~ 423 430 485 547 682 972
6 8 10 15 20 30 50	~~Local 99% winter design temperature: -10°F to 4°F~~	~~Local 99% winter design temperature: -10°F to 4°F~~	~~Local 99% winter design temperature: -10°F to 4°F~~	~~Local 99% winter design temperature: -10°F to 4°F~~	~~Local 99% winter design temperature: -10°F to 4°F~~	~~Local 99% winter design temperature: -10°F to 4°F~~	~~Local 99% winter design temperature: -10°F to 4°F~~	~~Local 99% winter design temperature: -10°F to 4°F~~
6 8 10 15 20 30 50	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	NA NA NA NA NA NA NA	~~484~~ 494 513 586 650 805 1003
~~Local 99% winter design temperature: -11°F or lower~~ Not recommended for any vent configurations

Notes: 1 See Figure 510.1.10 for a map showing local 99 percent winter design temperatures in the United States. 2 NA: Not applicable.

118 2019 CALIFORNIA PLUMBING CODE

WATER HEATERS

TABLE 510.2(1) TYPE B DOUBLE-WALL VENT [NFPA 54: TABLE 13.2(a)]*

					NUMBER OF APPLIANCES:						TWO OR MORE
					APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
					APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
		VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY
		TYPE B DOUBLE-WALL VENT AND CONNECTOR DIAMETER – D (inch)
		3	3	3	4	4	4	5	5	5	6	6	6	7	7	7
		APPLIANCE INPUT RATING LIMITS IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	1 2 3	22 23 24	37 41 44	26 31 35	35 37 38	66 75 81	46 55 62	46 48 49	~~106~~ 121 132	72 86 96	58 60 62	~~164~~ 183 199	~~104~~ 124 139	77 79 82	~~225~~ 253 275	~~142~~ 168 189
8	1 2 3	22 23 24	40 44 47	27 32 36	35 36 37	72 80 87	48 57 64	49 51 53	~~114~~ 128 139	76 90 101	64 66 67	~~176~~ 195 210	~~109~~ 129 145	84 86 88	~~243~~ 269 290	~~148~~ 175 198
10	1 2 3	22 23 24	43 47 50	28 33 37	34 36 37	78 86 92	50 59 67	49 51 52	~~123~~ 136 146	78 93 104	65 67 69	~~189~~ 206 220	~~113~~ 134 150	89 91 94	~~257~~ 282 303	~~154~~ 182 205
15	1 2 3	21 22 24	50 53 55	30 35 40	33 35 36	89 96 102	53 63 71	47 49 51	~~142~~ 153 163	83 99 111	64 66 68	~~220~~ 235 248	~~120~~ 142 160	88 91 93	~~298~~ 320 339	~~163~~ 193 218

					NUMBER OF APPLIANCES:						TWO OR MORE
20	1 2 3	21 22 23	54 57 60	31 37 42	33 34 35	99 105 110	56 66 74	46 48 50	~~157~~ 167 176	87 104 116	62 64 66	~~246~~ 259 271	~~125~~ 149 168	86 89 91	~~334~~ 354 371	~~171~~ 202 228
30	1 2 3	20 21 22	62 64 66	33 39 44	31 33 34	~~113~~ 118 123	59 70 79	45 47 48	~~181~~ 190 198	93 110 124	60 62 64	~~288~~ 299 309	~~134~~ 158 178	83 85 88	~~391~~ 408 423	~~182~~ 215 242
50	1 2 3	19 21 22	71 73 75	36 43 48	30 32 33	~~133~~ 137 141	64 76 86	43 45 46	~~216~~ 223 229	~~101~~ 119 134	57 59 61	~~349~~ 358 366	~~145~~ 172 194	78 81 83	~~477~~ 490 502	~~197~~ 234 263
~~100~~	1 2 3	18 19 20	82 83 84	37 44 50	28 30 31	~~158~~ 161 163	66 79 89	40 42 44	~~262~~ 267 272	~~104~~ 123 138	53 55 57	~~442~~ 447 452	~~150~~ 178 200	73 75 78	~~611~~ 619 627	~~204~~ 242 272

50 100	2 3 21 22 64 66 39 44 33 34 118 123 70 79 47 48 190 198 110 124 62 64 299 309 158 178 85 88 408 423 215 242 1 2 3 19 21 22 71 73 75 36 43 48 30 32 33 133 137 141 64 76 86 43 45 46 216 223 229 101 119 134 57 59 61 349 358 366 145 172 194 78 81 83 477 490 502 197 234 263 1 2 3 18 19 20 82 83 84 37 44 50 28 30 31 158 161 163 66 79 89 40 42 44 262 267 272 104 123 138 53 55 57 442 447 452 150 178 200 73 75 78 611 619 627 204 242 272
	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY
	TYPE B DOUBLE-WALL COMMON VENT DIAMETER – D (inch)
	4	4	4	5	5	5	6	6	6	7	7	7
	COMBINED APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT
6 8 10 15 20 30 50 100	92 101 110 125 136 152 167 175	81 90 97 112 123 138 153 163	65 73 79 91 102 118 134 NA	~~140~~ 155 169 195 215 244 279 311	~~116~~ 129 141 164 183 210 244 277	~~103~~ 114 124 144 160 185 214 NA	~~204~~ 224 243 283 314 361 421 489	~~161~~ 178 194 228 255 297 353 421	~~147~~ 163 178 206 229 266 310 NA	~~309~~ 339 367 427 475 547 641 751	~~248~~ 275 299 352 394 459 547 658	~~200~~ 223 242 280 310 360 423 479

NA: Not applicable.
NA: Not applicable.

2019 CALIFORNIA PLUMBING CODE 119

WATER HEATERS any other purpose or distributed to any other persons or parti es.

TABLE 510.2(1) TYPE B DOUBLE-WALL VENT [NFPA 54: TABLE 13.2(a)] (continued)

		NUMBER OF APPLIANCES:				TWO OR MORE
		APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
		APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
		VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY
		TYPE B DOUBLE-WALL VENT AND CONNECTOR DIAMETER – D (inch)
		8	8	8	9	9	9	10	10	10
		APPLIANCE INPUT RATING LIMITS IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	1 2 3	92 95 97	~~296~~ 333 363	~~185~~ 220 248	~~109~~ 112 114	~~376~~ 424 463	~~237~~ 282 317	~~128~~ 131 134	~~466~~ 526 575	~~289~~ 345 386
8	1 2 3	~~100~~ 103 105	~~320~~ 356 384	~~194~~ 230 258	~~118~~ 121 123	~~408~~ 454 492	~~248~~ 294 330	~~138~~ 141 143	~~507~~ 564 612	~~303~~ 358 402
10	1 2 3	~~106~~ 109 111	~~341~~ 374 402	~~200~~ 238 268	~~125~~ 128 131	~~436~~ 479 515	~~257~~ 305 342	~~146~~ 149 152	~~542~~ 596 642	~~314~~ 372 417
15	1 2 3	~~110~~ 112 115	~~389~~ 419 445	~~214~~ 253 286	~~134~~ 137 140	~~493~~ 532 565	~~273~~ 323 365	~~162~~ 165 167	~~609~~ 658 700	~~333~~ 394 444
20	1 2 3	~~107~~ 110 113	~~436~~ 463 486	~~224~~ 265 300	~~131~~ 134 137	~~552~~ 587 618	~~285~~ 339 383	~~158~~ 161 164	~~681~~ 725 764	~~347~~ 414 466
30	1 2 3	~~103~~ 105 108	~~512~~ 535 555	~~238~~ 282 317	~~125~~ 129 132	~~649~~ 679 706	~~305~~ 360 405	~~151~~ 155 158	~~802~~ 840 874	~~372~~ 439 494
50	1 2 3	97 100 103	~~627~~ 645 661	~~257~~ 306 343	~~120~~ 123 126	~~797~~ 820 842	~~330~~ 392 441	~~144~~ 148 151	~~984~~ 1014 1043	~~403~~ 478 538
~~100~~	1 2 3	91 94 97	~~810~~ 822 834	~~266~~ 316 355	~~112~~ 115 118	~~1038~~ 1054 1069	~~341~~ 405 455	~~135~~ 139 142	~~1285~~ 1306 1327	~~417~~ 494 555

120 2019 CALIFORNIA PLUMBING CODE

WATER HEATERS

TABLE 510.2(1) TYPE B DOUBLE-WALL VENT [NFPA 54: TABLE 13.2(a)] (continued)*

					NUMBER OF APPLIANCES:				TWO OR MORE
					APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
					APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
		VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY
		TYPE B DOUBLE-WALL VENT AND CONNECTOR DIAMETER – D (inch)
		12	12	12	14	14	14	16	16	16	18	18	18
		APPLIANCE INPUT RATING LIMITS IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	2 4 6	~~174~~ 180 NA	~~764~~ 897 NA	~~496~~ 616 NA	~~223~~ 230 NA	~~1046~~ 1231 NA	~~653~~ 827 NA	~~281~~ 287 NA	~~1371~~ 1617 NA	~~853~~ 1081 NA	~~346~~ 352 NA	~~1772~~ 2069 NA	~~1080~~ 1370 NA
8	2 4 6	~~186~~ 192 198	~~822~~ 952 1050	~~516~~ 644 772	~~238~~ 244 252	~~1126~~ 1307 1445	~~696~~ 884 1072	~~298~~ 305 313	~~1478~~ 1719 1902	~~910~~ 1150 1390	~~365~~ 372 380	~~1920~~ 2211 2434	~~1150~~ 1460 1770
10	2 4 6	~~196~~ 201 207	~~870~~ 997 1095	~~536~~ 664 792	~~249~~ 256 263	~~1195~~ 1371 1509	~~730~~ 924 1118	~~311~~ 318 325	~~1570~~ 1804 1989	~~955~~ 1205 1455	~~379~~ 387 395	~~2049~~ 2332 2556	~~1205~~ 1535 1865
15	2 4 6	~~214~~ 221 228	~~967~~ 1085 1181	~~568~~ 712 856	~~272~~ 279 286	~~1334~~ 1499 1632	~~790~~ 1006 1222	~~336~~ 344 351	~~1760~~ 1978 2157	~~1030~~ 1320 1610	~~408~~ 416 424	~~2317~~ 2579 2796	~~1305~~ 1665 2025
20	2 4 6	~~223~~ 230 237	~~1051~~ 1162 1253	~~596~~ 748 900	~~291~~ 298 307	~~1443~~ 1597 1726	~~840~~ 1064 1288	~~357~~ 365 373	~~1911~~ 2116 2287	~~1095~~ 1395 1695	~~430~~ 438 450	~~2533~~ 2778 2984	~~1385~~ 1765 2145
30	2 4 6	~~216~~ 223 231	~~1217~~ 1316 1400	~~632~~ 792 952	~~286~~ 294 303	~~1664~~ 1802 1920	~~910~~ 1160 1410	~~367~~ 376 384	~~2183~~ 2366 2524	~~1190~~ 1510 1830	~~461~~ 474 485	~~2891~~ 3110 3299	~~1540~~ 1920 2340
50	2 4 6	~~206~~ 213 221	~~1479~~ 1561 1631	~~689~~ 860 1031	~~273~~ 281 290	~~2023~~ 2139 2242	~~1007~~ 1291 1575	~~350~~ 359 369	~~2659~~ 2814 2951	~~1315~~ 1685 2055	~~435~~ 447 461	~~3548~~ 3730 3893	~~1665~~ 2135 2605

					NUMBER OF APPLIANCES:				TWO OR MORE
~~100~~	2 4 6	~~192~~ 200 208	~~1923~~ 1984 2035	~~712~~ 888 1064	~~254~~ 263 272	~~2644~~ 2731 2811	~~1050~~ 1346 1642	~~326~~ 336 346	~~3490~~ 3606 3714	~~1370~~ 1760 2150	~~402~~ 414 426	~~4707~~ 4842 4968	~~1740~~ 2220 2700

50 100	4 6 223 231 1316 1400 792 952 294 303 1802 1920 1160 1410 376 384 2366 2524 1510 1830 474 485 3110 3299 1920 2340 2 4 6 206 213 221 1479 1561 1631 689 860 1031 273 281 290 2023 2139 2242 1007 1291 1575 350 359 369 2659 2814 2951 1315 1685 2055 435 447 461 3548 3730 3893 1665 2135 2605 2 4 6 192 200 208 1923 1984 2035 712 888 1064 254 263 272 2644 2731 2811 1050 1346 1642 326 336 346 3490 3606 3714 1370 1760 2150 402 414 426 4707 4842 4968 1740 2220 2700
	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY
	TYPE B DOUBLE-WALL COMMON VENT DIAMETER – D (inch)
	12	12	12	14	14	14	16	16	16	18	18	18
	COMBINED APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT
6 8 10 15 20 30 50 100	~~900~~ 994 1076 1247 1405 1658 2024 2569	~~696~~ 773 841 986 1116 1327 1640 2131	~~588~~ 652 712 825 916 1025 1280 1670	~~1284~~ 1423 1542 1794 2006 2373 2911 3732	~~990~~ 1103 1200 1410 1588 1892 2347 3076	~~815~~ 912 995 1158 1290 1525 1863 2450	~~1735~~ 1927 2093 2440 2722 3220 3964 5125	~~1336~~ 1491 1625 1910 2147 2558 3183 4202	~~1065~~ 1190 1300 1510 1690 1990 2430 3200	~~2253~~ 2507 2727 3184 3561 4197 5184 6749	~~1732~~ 1936 2113 2484 2798 3326 4149 5509	~~1345~~ 1510 1645 1910 2140 2520 3075 4050

NA: Not applicable.
NA: Not applicable.

2019 CALIFORNIA PLUMBING CODE 121

WATER HEATERS any other purpose or distributed to any other persons or parti es.

TABLE 510.2(1) TYPE B DOUBLE-WALL VENT [NFPA 54: TABLE 13.2(a)] (continued)*

			NUMBER OF APPLIANCES:				TWO OR MORE
			APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
			APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
		VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY
		TYPE B DOUBLE-WALL VENT AND CONNECTOR DIAMETER – D (inch)
		20	20	20	22	22	22	24	24	24
		APPLIANCE INPUT RATING LIMITS IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	2 4 6	NA NA NA	NA NA NA	NA NA NA	NA NA NA	NA NA NA	NA NA NA	NA NA NA	NA NA NA	NA NA NA
8	2 4 6	NA 471 478	NA 2737 3018	NA 1800 2180	NA 560 568	NA 3319 3665	NA 2180 2640	NA 662 669	NA 3957 4373	NA 2590 3130
10	2 4 6	NA 486 494	NA 2887 3169	NA 1890 2290	NA 581 589	NA 3502 3849	NA 2280 2760	NA 686 694	NA 4175 4593	NA 2710 3270
15	2 4 6	NA 523 533	NA 3197 3470	NA 2060 2510	NA 624 634	NA 3881 4216	NA 2490 3030	NA 734 743	NA 4631 5035	NA 2960 3600
20	2 4 6	NA 554 567	NA 3447 3708	NA 2180 2650	NA 661 671	NA 4190 4511	NA 2630 3190	NA 772 785	NA 5005 5392	NA 3130 3790
30	2 4 6	NA 619 632	NA 3840 4080	NA 2365 2875	NA 728 741	NA 4861 4976	NA 2860 3480	NA 847 860	NA 5606 5961	NA 3410 4150
50	2 4 6	NA 580 594	NA 4601 4808	NA 2633 3208	NA 709 724	NA 5569 5826	NA 3185 3885	NA 851 867	NA 6633 6943	NA 3790 4620
~~100~~	2 4 6	NA 523 539	NA 5982 6143	NA 2750 3350	NA 639 654	NA 7254 7453	NA 3330 4070	NA 769 786	NA 8650 8892	NA 3950 4810

NA: Not applicable.
NA: Not applicable.

122 2019 CALIFORNIA PLUMBING CODE

WATER HEATERS

TABLE 510.2(2) TYPE B DOUBLE-WALL VENT [NFPA 54: TABLE 13.2(b)]*

					NUMBER OF APPLIANCES:						TWO OR MORE
					APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
					APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR
		VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY
		SINGLE-WALL METAL VENT CONNECTOR DIAMETER – D (inch)
		3	3	3	4	4	4	5	5	5	6	6	6	7	7	7
		APPLIANCE INPUT RATING LIMITS IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	1 2 3	NA NA NA	NA NA NA	26 31 34	NA NA NA	NA NA NA	46 55 62	NA NA 121	NA NA 131	71 85 95	NA 168 175	NA 182 198	~~102~~ 123 138	~~207~~ 215 222	~~223~~ 251 273	~~140~~ 167 188
8	1 2 3	NA NA NA	NA NA NA	27 32 35	NA NA NA	NA NA NA	48 57 64	NA 125 130	NA 126 138	75 89 100	NA 184 191	NA 193 208	~~106~~ 127 144	~~226~~ 234 241	~~240~~ 266 287	~~145~~ 173 197
10	1 2 3	NA NA NA	NA NA NA	28 33 36	NA 84 89	NA 85 91	50 59 67	~~119~~ 124 129	~~121~~ 134 144	77 91 102	~~182~~ 189 197	~~186~~ 203 217	~~110~~ 132 148	~~240~~ 248 257	~~253~~ 278 299	~~150~~ 183 203
15	1 2 3	NA NA NA	NA NA NA	29 34 39	79 83 87	87 94 100	52 62 70	~~116~~ 121 127	~~138~~ 150 160	81 97 109	~~177~~ 185 193	~~214~~ 230 243	~~116~~ 138 157	~~238~~ 246 255	~~291~~ 314 333	~~158~~ 189 215

					NUMBER OF APPLIANCES:						TWO OR MORE
20	1 2 3	49 52 55	56 59 62	30 36 40	78 82 87	97 103 107	54 64 72	~~115~~ 120 125	~~152~~ 163 172	84 101 113	~~175~~ 182 190	~~238~~ 252 264	~~120~~ 144 164	~~233~~ 243 252	~~325~~ 346 363	~~165~~ 197 223
30	1 2 3	47 51 54	60 62 64	31 37 42	77 81 85	~~110~~ 115 119	57 67 76	~~112~~ 117 122	~~175~~ 185 193	89 106 120	~~169~~ 177 185	~~278~~ 290 300	~~129~~ 152 172	~~226~~ 236 244	~~380~~ 397 412	~~175~~ 208 235
50	1 2 3	46 49 52	69 71 72	34 40 45	75 79 83	~~128~~ 132 136	60 72 82	~~109~~ 114 119	~~207~~ 215 221	96 113 123	~~162~~ 170 178	~~336~~ 345 353	~~137~~ 164 186	~~217~~ 226 235	~~460~~ 473 486	~~188~~ 223 252
~~100~~	1 2 3	45 48 51	79 80 81	34 41 46	71 75 79	~~150~~ 153 157	61 73 85	~~104~~ 110 114	~~249~~ 255 260	98 115 129	~~153~~ 160 168	~~424~~ 428 433	~~140~~ 167 190	~~205~~ 212 222	~~585~~ 593 603	~~192~~ 228 256

50 100	2 3 51 54 62 64 37 42 81 85 115 119 67 76 117 122 185 193 106 120 177 185 290 300 152 172 236 244 397 412 208 235 1 2 3 46 49 52 69 71 72 34 40 45 75 79 83 128 132 136 60 72 82 109 114 119 207 215 221 96 113 123 162 170 178 336 345 353 137 164 186 217 226 235 460 473 486 188 223 252 1 2 3 45 48 51 79 80 81 34 41 46 71 75 79 150 153 157 61 73 85 104 110 114 249 255 260 98 115 129 153 160 168 424 428 433 140 167 190 205 212 222 585 593 603 192 228 256
	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY
	TYPE B DOUBLE-WALL COMMON VENT DIAMETER – D (inch)
	4	4	4	5	5	5	6	6	6	7	7	7
	COMBINED APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT
6 8 10 15 20 30 50 100	NA NA NA 121 131 145 159 166	78 87 94 108 118 132 145 153	64 71 76 88 98 113 128 NA	NA NA 163 189 208 236 268 297	~~113~~ 126 137 159 177 202 233 263	99 111 120 140 156 180 208 NA	~~200~~ 218 237 275 305 350 406 469	~~158~~ 173 189 221 247 286 337 398	~~144~~ 159 174 200 223 257 296 NA	~~304~~ 331 357 416 463 533 622 726	~~244~~ 269 292 343 383 446 529 633	~~196~~ 218 236 274 302 349 410 464

NA: Not applicable.
NA: Not applicable.

2019 CALIFORNIA PLUMBING CODE 123

WATER HEATERS any other purpose or distributed to any other persons or parti es.

TABLE 510.2(2) TYPE B DOUBLE-WALL VENT [NFPA			54: TABLE 13.2(b)] (continued)
			NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	TWO OR MORE	TWO OR MORE	TWO OR MORE	TWO OR MORE
			APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
			APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR
		VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY
		SINGLE-WALL METAL VENT CONNECTOR DIAMETER – D (inch)
		8	8	8	9	9	9	10	10	10
		APPLIANCE INPUT RATING LIMITS IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	1 2 3	~~262~~ 271 279	~~293~~ 331 361	~~183~~ 219 247	~~325~~ 334 344	~~373~~ 422 462	~~234~~ 281 316	~~447~~ 458 468	~~463~~ 524 574	~~286~~ 344 385
8	1 2 3	~~285~~ 293 302	~~316~~ 353 381	~~191~~ 228 256	~~352~~ 360 370	~~403~~ 450 489	~~244~~ 292 328	~~481~~ 492 501	~~502~~ 560 609	~~299~~ 355 400
10	1 2 3	~~302~~ 311 320	~~335~~ 369 398	~~196~~ 235 265	~~372~~ 381 391	~~429~~ 473 511	~~252~~ 302 339	~~506~~ 517 528	~~534~~ 589 637	~~308~~ 368 413
15	1 2 3	~~312~~ 321 331	~~380~~ 411 438	~~208~~ 248 281	~~397~~ 407 418	~~482~~ 522 557	~~266~~ 317 360	~~556~~ 568 579	~~596~~ 646 690	~~324~~ 387 437
20	1 2 3	~~306~~ 317 326	~~425~~ 453 476	~~217~~ 259 294	~~390~~ 400 412	~~538~~ 574 607	~~276~~ 331 375	~~546~~ 558 570	~~664~~ 709 750	~~336~~ 403 457
30	1 2 3	~~296~~ 307 316	~~497~~ 521 542	~~230~~ 274 309	~~378~~ 389 400	~~630~~ 662 690	~~294~~ 349 394	~~528~~ 541 555	~~779~~ 819 855	~~358~~ 425 482
50	1 2 3	~~284~~ 294 304	~~604~~ 623 640	~~245~~ 293 331	~~364~~ 376 387	~~768~~ 793 816	~~314~~ 375 423	~~507~~ 520 535	~~951~~ 983 1013	~~384~~ 458 518
~~100~~	1 2 3	~~269~~ 279 289	~~774~~ 788 801	~~249~~ 299 339	~~345~~ 358 368	~~993~~ 1011 1027	~~321~~ 383 431	~~476~~ 490 506	~~1236~~ 1259 1280	~~393~~ 469 527

50 100	2 3 307 316 521 542 274 309 389 400 662 690 349 394 541 555 819 855 425 482 1 2 3 284 294 304 604 623 640 245 293 331 364 376 387 768 793 816 314 375 423 507 520 535 951 983 1013 384 458 518 1 2 3 269 279 289 774 788 801 249 299 339 345 358 368 993 1011 1027 321 383 431 476 490 506 1236 1259 1280 393 469 527
	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY
	TYPE B DOUBLE-WALL COMMON VENT DIAMETER – D (inch)
	8	8	8	9	9	9	10	10	10
	COMBINED APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT
6 8 10 15 20 30 50 100	~~398~~ 436 467 544 606 703 833 999	~~310~~ 342 369 434 487 570 686 846	~~257~~ 285 309 357 395 459 535 606	~~541~~ 592 638 738 824 958 1139 1378	~~429~~ 473 512 599 673 790 954 1185	~~332~~ 373 398 456 512 593 689 780	~~665~~ 730 787 905 1013 1183 1418 1741	~~515~~ 569 617 718 808 952 1157 1459	~~407~~ 460 487 553 626 723 838 948

124 2019 CALIFORNIA PLUMBING CODE

WATER HEATERS

TABLE 510.2(3) MASONRY CHIMNEY [NFPA 54: TABLE 13.2(c)]*

					NUMBER OF APPLIANCES:						TWO OR MORE
					APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
					APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
		VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY
		TYPE B DOUBLE-WALL VENT CONNECTOR DIAMETER – D (inch)
		3	3	3	4	4	4	5	5	5	6	6	6	7	7	7
		APPLIANCE INPUT RATING LIMITS IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	1 2 3	24 26 27	33 43 49	21 28 34	39 41 42	62 79 92	40 52 61	52 53 55	~~106~~ 133 155	67 85 97	65 67 69	~~194~~ 230 262	~~101~~ 124 143	87 89 91	~~274~~ 324 369	~~141~~ 173 203
8	1 2 3	24 26 27	39 47 52	22 29 34	39 40 42	72 87 97	41 53 62	55 57 59	~~117~~ 140 159	69 86 98	71 73 75	~~213~~ 246 269	~~105~~ 127 145	94 97 99	~~304~~ 350 383	~~148~~ 179 206
10	1 2 3	24 26 27	42 50 55	22 29 35	38 40 41	80 93 105	42 54 63	55 57 58	~~130~~ 153 170	71 87 100	74 76 78	~~232~~ 261 284	~~108~~ 129 148	~~101~~ 103 106	~~324~~ 366 397	~~153~~ 184 209
15	1 2 3	24 25 26	48 55 59	23 31 35	38 39 41	93 105 115	44 55 64	54 56 57	~~154~~ 174 189	74 89 102	72 74 76	~~277~~ 299 319	~~114~~ 134 153	~~100~~ 103 105	~~384~~ 419 448	~~164~~ 192 215

					NUMBER OF APPLIANCES:						TWO OR MORE
20	1 2 3	24 25 26	52 58 63	24 31 35	37 39 40	~~102~~ 114 123	46 56 65	53 55 57	~~172~~ 190 204	77 91 104	71 73 75	~~313~~ 335 353	~~119~~ 138 157	98 101 104	~~437~~ 467 493	~~173~~ 199 222
30	1 2 3	24 25 26	54 60 64	25 32 36	37 38 40	~~111~~ 122 131	48 58 66	52 54 56	~~192~~ 208 221	82 95 107	69 72 74	~~357~~ 376 392	~~127~~ 145 163	96 99 101	~~504~~ 531 554	~~187~~ 209 233
50	1 2 3	23 24 26	51 59 64	25 32 36	36 37 39	~~116~~ 127 135	51 61 69	51 53 55	~~209~~ 225 237	89 102 115	67 70 72	~~405~~ 421 435	~~143~~ 161 180	92 95 98	~~582~~ 604 624	~~213~~ 235 260
~~100~~	1 2 3	23 24 25	46 53 59	24 31 35	35 37 38	~~108~~ 120 130	50 60 68	49 51 53	~~208~~ 224 237	92 105 118	65 67 69	~~428~~ 444 458	~~155~~ 174 193	88 92 94	~~640~~ 660 679	~~237~~ 260 285

50 100	2 3 25 26 60 64 32 36 38 40 122 131 58 66 54 56 208 221 95 107 72 74 376 392 145 163 99 101 531 554 209 233 1 2 3 23 24 26 51 59 64 25 32 36 36 37 39 116 127 135 51 61 69 51 53 55 209 225 237 89 102 115 67 70 72 405 421 435 143 161 180 92 95 98 582 604 624 213 235 260 1 2 3 23 24 25 46 53 59 24 31 35 35 37 38 108 120 130 50 60 68 49 51 53 208 224 237 92 105 118 65 67 69 428 444 458 155 174 193 88 92 94 640 660 679 237 260 285
	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY
	MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches)
	12	12	12	19	19	19	28	28	28	38	38	38	50	50	50
	COMBINED APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT
6 8 10 15 20 30 50 100	NA NA NA NA NA NA NA NA	74 80 84 NA NA NA NA NA	25 28 31 36 41 NA NA NA	NA NA NA NA NA NA NA NA	~~119~~ 130 138 152 NA NA NA NA	46 53 56 67 75 NA NA NA	NA NA NA NA NA NA NA NA	~~178~~ 193 207 233 250 270 NA NA	71 82 90 106 122 137 NA NA	NA NA NA NA NA NA NA NA	~~257~~ 279 299 334 368 404 NA NA	~~103~~ 119 131 152 172 198 NA NA	NA NA NA 523 565 615 NA NA	~~351~~ 384 409 467 508 564 620 NA	~~143~~ 163 177 212 243 278 328 348

NA: Not applicable.
NA: Not applicable.

2019 CALIFORNIA PLUMBING CODE 125

WATER HEATERS any other purpose or distributed to any other persons or parti es.

TABLE 510.2(3) MASONRY CHIMNEY [NFPA 54: TABLE 13.2(c)] (continued)*

			NUMBER OF APPLIANCES:				TWO OR MORE
			APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
			APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
		VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY
		TYPE B DOUBLE-WALL VENT CONNECTOR DIAMETER – D (inch)
		8	8	8	9	9	9	10	10	10
		APPLIANCE INPUT RATING LIMITS IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	1 2 3	~~104~~ 107 109	~~370~~ 436 491	~~201~~ 232 270	~~124~~ 127 129	~~479~~ 562 633	~~253~~ 300 349	~~145~~ 148 151	~~599~~ 694 795	~~319~~ 378 439
8	1 2 3	~~113~~ 116 119	~~414~~ 473 517	~~210~~ 240 276	~~134~~ 137 139	~~539~~ 615 672	~~267~~ 311 358	~~156~~ 160 163	~~682~~ 776 848	~~335~~ 394 452
10	1 2 3	~~120~~ 123 126	~~444~~ 498 540	~~216~~ 247 281	~~142~~ 145 147	~~582~~ 652 705	~~277~~ 321 366	~~165~~ 168 171	~~739~~ 825 893	~~348~~ 407 463
15	1 2 3	~~125~~ 128 131	~~511~~ 558 597	~~229~~ 260 292	~~153~~ 156 159	~~658~~ 718 760	~~297~~ 339 382	~~184~~ 187 190	~~824~~ 900 960	~~375~~ 432 486
20	1 2 3	~~123~~ 126 129	~~584~~ 625 661	~~239~~ 270 301	~~150~~ 153 156	~~752~~ 805 851	~~312~~ 354 396	~~180~~ 184 187	~~943~~ 1011 1067	~~397~~ 452 505
30	1 2 3	~~119~~ 122 125	~~680~~ 715 746	~~255~~ 287 317	~~145~~ 149 152	~~883~~ 928 968	~~337~~ 378 418	~~175~~ 179 182	~~1115~~ 1171 1220	~~432~~ 484 535
50	1 2 3	~~115~~ 118 121	~~798~~ 827 854	~~294~~ 326 357	~~140~~ 143 147	~~1049~~ 1085 1118	~~392~~ 433 474	~~168~~ 172 176	~~1334~~ 1379 1421	~~506~~ 558 611
~~100~~	1 2 3	~~109~~ 113 116	~~907~~ 933 956	~~334~~ 368 399	~~134~~ 138 141	~~1222~~ 1253 1282	~~454~~ 497 540	~~161~~ 165 169	~~1589~~ 1626 1661	~~596~~ 651 705

50 100	2 3 122 125 715 746 287 317 149 152 928 968 378 418 179 182 1171 1220 484 535 1 2 3 115 118 121 798 827 854 294 326 357 140 143 147 1049 1085 1118 392 433 474 168 172 176 1334 1379 1421 506 558 611 1 2 3 109 113 116 907 933 956 334 368 399 134 138 141 1222 1253 1282 454 497 540 161 165 169 1589 1626 1661 596 651 705
	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY
	MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches)
	63	63	63	78	78	78	113	113	113
	COMBINED APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT
6 8 10 15 20 30 50 100	NA NA 606 682 742 816 879 NA	~~458~~ 501 538 611 668 747 831 NA	~~188~~ 218 236 283 325 381 461 499	NA 724 776 874 955 1062 1165 NA	~~582~~ 636 686 781 858 969 1089 NA	~~246~~ 278 302 365 419 496 606 669	~~1041~~ 1144 1226 1374 1513 1702 1905 2053	~~853~~ 937 1010 1156 1286 1473 1692 1921	NA 408 454 546 648 749 922 1058

NA: Not applicable.
NA: Not applicable.

126 2019 CALIFORNIA PLUMBING CODE

WATER HEATERS

TABLE 510.2(4) MASONRY CHIMNEY [NFPA 54: TABLE 13.2(d)]*

					NUMBER OF APPLIANCES:						TWO OR MORE
					APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
					APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR
		VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY
		SINGLE-WALL METAL VENT CONNECTOR DIAMETER– D (inch)
		3	3	3	4	4	4	5	5	5	6	6	6	7	7	7
		APPLIANCE INPUT RATING LIMITS IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	1 2 3	NA NA NA	NA NA NA	21 28 34	NA NA NA	NA NA NA	39 52 61	NA NA 134	NA NA 153	66 84 97	~~179~~ 186 193	~~191~~ 227 258	~~100~~ 123 142	~~231~~ 239 247	~~271~~ 321 365	~~140~~ 172 202
8	1 2 3	NA NA NA	NA NA NA	21 28 34	NA NA NA	NA NA NA	40 52 62	NA 137 143	NA 139 156	68 85 98	~~195~~ 202 210	~~208~~ 240 264	~~103~~ 125 145	~~250~~ 258 266	~~298~~ 343 376	~~146~~ 177 205
10	1 2 3	NA NA NA	NA NA NA	22 29 34	NA NA 97	NA NA 102	41 53 62	~~130~~ 136 143	~~151~~ 150 166	70 86 99	~~202~~ 210 217	~~225~~ 255 277	~~106~~ 128 147	~~267~~ 276 284	~~316~~ 358 389	~~151~~ 181 207
15	1 2 3	NA NA NA	NA NA NA	23 30 34	NA 92 96	NA 103 112	43 54 63	~~129~~ 135 141	~~151~~ 170 185	73 88 101	~~199~~ 207 215	~~271~~ 295 315	~~112~~ 132 151	~~268~~ 277 286	~~376~~ 411 439	~~161~~ 189 213

					NUMBER OF APPLIANCES:						TWO OR MORE
20	1 2 3	NA NA NA	NA NA NA	23 30 35	87 91 96	99 111 119	45 55 64	~~128~~ 134 140	~~167~~ 185 199	76 90 103	~~197~~ 205 213	~~303~~ 325 343	~~117~~ 136 154	~~265~~ 274 282	~~425~~ 455 481	~~169~~ 195 219
30	1 2 3	NA NA NA	NA NA NA	24 31 35	86 91 95	~~108~~ 119 127	47 57 65	~~126~~ 132 138	~~187~~ 203 216	80 93 105	~~193~~ 201 209	~~347~~ 366 381	~~124~~ 142 160	~~259~~ 269 277	~~492~~ 518 540	~~183~~ 205 229
50	1 2 3	NA NA NA	NA NA NA	24 31 35	85 89 94	~~113~~ 123 131	50 60 68	~~124~~ 130 136	~~204~~ 218 231	87 100 112	~~188~~ 196 205	~~392~~ 408 422	~~139~~ 158 176	~~252~~ 262 271	~~567~~ 588 607	~~208~~ 230 255
~~100~~	1 2 3	NA NA NA	NA NA NA	23 30 34	84 88 93	~~104~~ 115 124	49 59 67	~~122~~ 127 133	~~200~~ 215 228	89 102 115	~~182~~ 190 199	~~410~~ 425 438	~~151~~ 169 188	~~243~~ 253 262	~~617~~ 636 654	~~232~~ 254 279

50 100	2 3 NA NA NA NA 31 35 91 95 119 127 57 65 132 138 203 216 93 105 201 209 366 381 142 160 269 277 518 540 205 229 1 2 3 NA NA NA NA NA NA 24 31 35 85 89 94 113 123 131 50 60 68 124 130 136 204 218 231 87 100 112 188 196 205 392 408 422 139 158 176 252 262 271 567 588 607 208 230 255 1 2 3 NA NA NA NA NA NA 23 30 34 84 88 93 104 115 124 49 59 67 122 127 133 200 215 228 89 102 115 182 190 199 410 425 438 151 169 188 243 253 262 617 636 654 232 254 279
	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY	COMMON VENT CAPACITY
	MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches)
	12	12	12	19	19	19	28	28	28	38	38	38	50	50	50
	COMBINED APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT	FAN +FAN	FAN +NAT	NAT +NAT
6 8 10 15 20 30 50 100	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	25 28 31 36 NA NA NA NA	NA NA NA NA NA NA NA NA	~~118~~ 128 136 NA NA NA NA NA	45 52 56 66 74 NA NA NA	NA NA NA NA NA NA NA NA	~~176~~ 190 205 230 247 NA NA NA	71 81 89 105 120 135 NA NA	NA NA NA NA NA NA NA NA	~~255~~ 276 295 335 362 398 NA NA	~~102~~ 118 129 150 170 195 NA NA	NA NA NA NA NA NA NA NA	~~348~~ 380 405 400 503 558 612 NA	~~142~~ 162 175 210 240 275 325 NA

NA: Not applicable.
NA: Not applicable.

2019 CALIFORNIA PLUMBING CODE 127

WATER HEATERS any other purpose or distributed to any other persons or parti es.

TABLE 510.2(4) MASONRY CHIMNEY [NFPA 54: TABLE 13.2(d)] (continued)*

			NUMBER OF APPLIANCES:				TWO OR MORE
			APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	APPLIANCE TYPE:	CATEGORY I	CATEGORY I	CATEGORY I	CATEGORY I
			APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR	SINGLE-WALL METAL CONNECTOR
		VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY	VENT CONNECTOR CAPACITY
		SINGLE-WALL METAL VENT CONNECTOR DIAMETER – D (inch)
		8	8	8	9	9	9	10	10	10
		APPLIANCE INPUT RATING LIMITS IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	FAN	FAN	NAT	FAN	FAN	NAT	FAN	FAN	NAT
VENT HEIGHT H (feet)	CONNECTOR RISE R (feet)	Min	Max	Max	Min	Max	Max	Min	Max	Max
6	1 2 3	~~292~~ 301 309	~~366~~ 432 491	~~200~~ 231 269	~~362~~ 373 381	~~474~~ 557 634	~~252~~ 299 348	~~499~~ 509 519	~~594~~ 696 793	~~316~~ 376 437
8	1 2 3	~~313~~ 323 332	~~407~~ 465 509	~~207~~ 238 274	~~387~~ 397 407	~~530~~ 607 663	~~263~~ 309 356	~~529~~ 540 551	~~672~~ 766 838	~~331~~ 391 450
10	1 2 3	~~333~~ 343 352	~~434~~ 489 530	~~213~~ 244 279	~~410~~ 420 430	~~571~~ 640 694	~~273~~ 317 363	~~558~~ 569 580	~~727~~ 813 880	~~343~~ 403 459
15	1 2 3	~~349~~ 359 368	~~502~~ 548 586	~~225~~ 256 289	~~445~~ 456 466	~~646~~ 706 755	~~291~~ 334 378	~~623~~ 634 646	~~808~~ 884 945	~~366~~ 424 479
20	1 2 3	~~345~~ 355 365	~~569~~ 610 644	~~235~~ 266 298	~~439~~ 450 461	~~734~~ 787 831	~~306~~ 348 391	~~614~~ 627 639	~~921~~ 986 1042	~~387~~ 443 496
30	1 2 3	~~338~~ 348 358	~~665~~ 699 729	~~250~~ 282 312	~~430~~ 442 452	~~864~~ 908 946	~~330~~ 372 412	~~600~~ 613 626	~~1089~~ 1145 1193	~~421~~ 473 524
50	1 2 3	~~328~~ 339 349	~~778~~ 806 831	~~287~~ 320 351	~~417~~ 429 440	~~1022~~ 1058 1090	~~383~~ 425 466	~~582~~ 596 610	~~1302~~ 1346 1386	~~492~~ 545 597
~~100~~	1 2 3	~~315~~ 326 337	~~875~~ 899 921	~~328~~ 361 392	~~402~~ 415 427	~~1181~~ 1210 1238	~~444~~ 488 529	~~560~~ 575 589	~~1537~~ 1570 1604	~~580~~ 634 687

NA: Not applicable.
NA: Not applicable.

128 2019 CALIFORNIA PLUMBING CODE

WATER HEATERS

TABLE 510.2(5) SINGLE-WALL METAL PIPE OR TYPE B ASBESTOS-CEMENT VENT [NFPA 54: TABLE 13.2(e)]*

					NUMBER OF APPLIANCES:	TWO OR MORE
					APPLIANCE TYPE:	DRAFT HOOD-EQUIPMENT	DRAFT HOOD-EQUIPMENT	DRAFT HOOD-EQUIPMENT
					APPLIANCE VENT CONNECTION:	DIRECT TO PIPE OR VENT	DIRECT TO PIPE OR VENT	DIRECT TO PIPE OR VENT
					VENT CONNECTOR CAPACITY
					VENT CONNECTOR DIAMETER – D (inch)	VENT CONNECTOR DIAMETER – D (inch)
TOTAL VENT	CONNECTOR	CONNECTOR	3		4 5 6	7		8
HEIGHT H (feet) 6-8 15 30 and up		RISE R (feet) 1 2 3 1 2 3 1 2 3	21 28 34 23 30 35 25 31 36		APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR 40 53 61 68 86 98 ~~102~~ 124 147 ~~146~~ 178 204 44 56 64 77 92 102 ~~117~~ 134 155 ~~179~~ 194 216 49 58 68 84 97 107 ~~129~~ 145 164 ~~190~~ 211 232	APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR 40 53 61 68 86 98 ~~102~~ 124 147 ~~146~~ 178 204 44 56 64 77 92 102 ~~117~~ 134 155 ~~179~~ 194 216 49 58 68 84 97 107 ~~129~~ 145 164 ~~190~~ 211 232		~~205~~ 235 275 ~~240~~ 265 298 ~~270~~ 295 321
					COMMON VENT CAPACITY
					COMMON VENT DIAMETER – D (inch)
TOTAL VENT		4	5		6 7 8	10		12
HEIGHT H (feet) 6 8 10 15 20 30 50		48 55 59 71 80 NA NA	COMBINED 78 89 95 115 129 147 NA	COMBINED 78 89 95 115 129 147 NA	APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR ~~111~~ 128 136 168 186 215 NA ~~155~~ 175 190 228 260 300 360 ~~205~~ 234 250 305 340 400 490 ~~320~~ 365 395 480 550 650 810	APPLIANCE INPUT RATING IN THOUSANDS OF BTU PER HOUR ~~111~~ 128 136 168 186 215 NA ~~155~~ 175 190 228 260 300 360 ~~205~~ 234 250 305 340 400 490 ~~320~~ 365 395 480 550 650 810		NA 505 560 690 790 940 1190

NA: Not applicable.
NA: Not applicable.

TABLE 510.2(6) EXTERIOR MASONRY CHIMNEY [NFPA 54: TABLE 13.2(f)]*

				NUMBER OF APPLIANCES:		TWO OR MORE
				APPLIANCE TYPE:	APPLIANCE TYPE:	NAT + NAT	NAT + NAT	NAT + NAT
				APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
COMBINED APPLIANCE MAXIMUM INPUT RATING IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)
VENT HEIGHT H (feet)	12	19	28	38	50	63	78	113
6 8 10 15 20 30 50 100	25 28 31 NA NA NA NA NA	46 53 56 67 NA NA NA NA	71 82 90 106 NA NA NA NA	~~103~~ 119 131 152 NA NA NA NA	~~143~~ 163 177 212 NA NA NA NA	~~188~~ 218 236 283 325 NA NA NA	~~246~~ 278 302 365 419 496 NA NA	NA 408 454 546 648 749 922 NA

NA: Not applicable.
NA: Not applicable.

2019 CALIFORNIA PLUMBING CODE 129

WATER HEATERS any other purpose or distributed to any other persons or parti es.

TABLE 510.2(7) EXTERIOR MASONRY CHIMNEY [NFPA 54: TABLE 13.2(g)]1, 2				2
				NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	TWO OR MORE	TWO OR MORE	TWO OR MORE
				APPLIANCE TYPE:	APPLIANCE TYPE:	NAT + NAT	NAT + NAT	NAT + NAT
				APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
MINIMUM ALLOWABLE INPUT RATING OF SPACE-HEATING APPLIANCE IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)
VENT HEIGHT H (feet)	12	19	28	38	50	63	78	113

6 8 10 15 20 30 50 100	0 0 0 NA NA NA NA NA	0 0 0 0 NA NA NA NA	0 0 0 0 NA NA NA NA	0 0 0 0 NA NA NA NA	0 0 0 0 NA NA NA NA	0 0 0 0 184 393 NA NA	0 0 0 0 0 334 NA NA	NA 0 0 0 0 0 579 NA

6 8 10 15 20 30 50 100	0 0 0 NA NA NA NA NA	0 0 51 NA NA NA NA NA	68 82 NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	~~180~~ 187 201 253 307 NA NA NA	~~212~~ 214 225 274 330 445 NA NA	NA 263 265 305 362 485 763 NA

6 8 10 15 20 30 50 100	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA 264 278 331 387 NA NA NA	NA 352 358 398 457 581 862 NA

TABLE 510.2(7) EXTERIOR MASONRY CHIMNEY [NFPA 54: TABLE 13.2(g)]1, 2				2
6 8 10 15 20 30 50 100	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	NA NA 430 485 547 682 NA NA
~~Local 99% winter design temperature: 4°F or lower~~ Not recommended for any vent configurations

Notes: 1 See Figure 510.1.10 for a map showing local 99 percent winter design temperatures in the United States. 2 NA: Not applicable.

130 2019 CALIFORNIA PLUMBING CODE

WATER HEATERS

TABLE 510.2(8) EXTERIOR MASONRY CHIMNEY [NFPA 54: TABLE 13.2(h)]*

				NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	TWO OR MORE	TWO OR MORE	TWO OR MORE
				APPLIANCE TYPE:	APPLIANCE TYPE:	FAN + NAT	FAN + NAT	FAN + NAT
				APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
COMBINED APPLIANCE MAXIMUM INPUT RATING IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)
VENT HEIGHT H (feet)	12	19	28	38	50	63	78	113
6 8 10 15 20 30 50 100	74 80 84 NA NA NA NA NA	~~119~~ 130 138 152 NA NA NA NA	~~178~~ 193 207 233 250 NA NA NA	~~257~~ 279 299 334 368 404 NA NA	~~351~~ 384 409 467 508 564 NA NA	~~458~~ 501 538 611 668 747 831 NA	~~582~~ 636 686 781 858 969 1089 NA	~~853~~ 937 1010 1156 1286 1473 1692 1921

NA: Not applicable.
NA: Not applicable.

2019 CALIFORNIA PLUMBING CODE 131

WATER HEATERS any other purpose or distributed to any other persons or parti es.

TABLE 510.2(9) EXTERIOR MASONRY CHIMNEY [NFPA 54: TABLE 13.2(i)]1,				, 2
				NUMBER OF APPLIANCES:	NUMBER OF APPLIANCES:	TWO OR MORE	TWO OR MORE	TWO OR MORE
				APPLIANCE TYPE:	APPLIANCE TYPE:	FAN + NAT	FAN + NAT	FAN + NAT
				APPLIANCE VENT CONNECTION:	APPLIANCE VENT CONNECTION:	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR	TYPE B DOUBLE-WALL CONNECTOR
MINIMUM ALLOWABLE INPUT RATING OF SPACE-HEATING APPLIANCE IN THOUSANDS OF BTU PER HOUR
VENT HEIGHT H (feet)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)	INTERNAL AREA OF CHIMNEY (square inches)
VENT HEIGHT H (feet)	12	19	28	38	50	63	78	113

6 8 10 15 20 30 50 100	0 0 0 NA NA NA NA NA	0 0 0 0 NA NA NA NA	0 0 0 0 123 NA NA NA	0 0 0 0 190 334 NA NA	0 0 0 0 249 398 NA NA	0 0 0 0 184 393 714 NA	0 0 0 0 0 334 707 NA	0 0 0 0 0 0 579 1600

6 8 10 15 20 30 50 100	0 0 0 NA NA NA NA NA	0 0 51 111 NA NA NA NA	68 82 97 142 187 NA NA NA	~~116~~ 127 141 183 230 330 NA NA	~~156~~ 167 183 233 284 319 NA NA	~~180~~ 187 201 253 307 419 672 NA	~~212~~ 214 225 274 330 445 705 NA	~~266~~ 263 265 305 362 485 763 1554

6 8 10 15 20 30 50 100	0 52 NA NA NA NA NA NA	55 74 90 NA NA NA NA NA	99 111 125 167 212 NA NA NA	~~141~~ 154 169 212 258 362 NA NA	~~182~~ 197 214 263 316 429 NA NA	~~215~~ 226 245 296 352 470 723 NA	~~259~~ 264 278 331 387 507 766 NA	~~349~~ 352 358 398 457 581 862 1669

TABLE 510.2(9) EXTERIOR MASONRY CHIMNEY [NFPA 54: TABLE 13.2(i)]1,				, 2
6 8 10 15 20 30 50 100	NA NA NA NA NA NA NA NA	78 94 111 NA NA NA NA NA	~~121~~ 135 149 193 NA NA NA NA	~~166~~ 182 198 247 293 377 NA NA	~~214~~ 230 250 305 360 450 NA NA	~~252~~ 269 289 346 408 531 797 NA	~~301~~ 312 331 393 450 580 853 NA	~~416~~ 423 430 485 547 682 972 1833

6 8 10 15 20 30 50 100	NA NA NA NA NA NA NA NA	NA NA NA NA NA NA NA NA	~~145~~ 159 175 NA NA NA NA NA	~~196~~ 213 231 283 333 NA NA NA	~~249~~ 269 292 351 408 NA NA NA	~~296~~ 320 339 404 468 603 NA NA	~~349~~ 371 397 457 528 667 955 NA	~~484~~ 494 513 586 650 805 1003 NA
~~Local 99% winter design temperature: -11°F or lower~~ Not recommended for any vent configurations

Notes: 1 See Figure 510.1.10 for a map showing local 99 percent winter design temperatures in the United States. 2 NA: Not applicable.

132 2019 CALIFORNIA PLUMBING CODE

CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE

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▸Contents — California Plumbing Code (Title 24, Part 5)

California Plumbing Code (Title 24, Part 5)