csa-b149-1
TRANSCRIPT
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Amendment #1 Vent Sizing Tables March 1994 Mailing CardIMPORTANT NOTICE
ThE 8149.1-M91 NATURAT GAS INSTALLATION CODE, 8149.2-Mg1 PROPANE INSTALLATION CODEAND oNTAR/o cAs urtLIzATtoN coDE, t9B9 NATURAT GAs tNsrALLATtaN coDE loGucrsas; aresubject to periodic review which may result in revisions being published from time to time.
'lf you wish to be
notif ied of such revisions, complete and return THts MAiLING CARD (NoT A pHoTocbp! to CGAApprovals. we must receive one card for each code purchased. There may be a charge.THIS CARD REPLACES ANY PREVIOUS MAILING CARDS SUBMITTED FOR THE 849.1-M91, 8149.2-M91 OR OGUC1989. PLEASE NOTE THAT WE DO rygr MAINTAIN MAILING LISTS.Gheck which Code you have purchased in the applicable box below.n et+g.t-t\Igt [ 8149.2-M91 n OGUc 19s9.Organization
Title orDepartment
Street Address
Individual
City Province/State PostalCodeNumber of Qodes Purchased
(lf you have purchased more than one OGUC1989, please complete one card, and return it, and all other mailing cards.
P b$sltLAMENDMENT #1
CANiCGA-8149.1-M91 and CAN/CGA-8149.2-M9INATURAL GAS, AND PROPANE INSTALLATION CODES
VENT SIZING TABLES
for
CATEGORY I
NATURAL GAS ANDPROPANE APPLIANCES
The following have been revoked and substituted with this docment;
1. Appendix B of CAN/CGA-81.49."1-M97, Natural GasInstallation Code,
2. Appendix B of CAN/CGA-81,49.2-M91,, Propane InstallationCode, and
3. Clauses 7.12.8, 7.73.1,, 7.13.2, 7.21.2 and 7.21.5 of the Codesin 1. and 2.
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-iltta
IDdSZSI@
:,yNovenber (1992)
@ copyright CANADIAN GAS ASSOCIATION
AMENDMENT#1CAN/CGA-8149.1-M91 and CAN/CGA-8149.2-M91
NATURAL GAS, AND PROPANE INSTALLATION CODES
VENT SIZING TABLES \FOR
CATEGORY 1NATURAL GAS AND PROPANE APPLIANCES
PREFACE
These tables were developed to provide a convenient method ofdetermining vent sizes for venting natural draft and fan-assistedCategory I appliances. Additionally, the tables provide the vent sizesthat apply to spil lage-susceptible appliances: (1) Natural draftappliances in either tight structures, as defined in Clause 7.2.7 of theCAN,/CGA-B149.1-M91 and CAN,/CGA-B149.2-M91 Installation Codes,or (2) Structures where the mechanically ventilation is designed for nomore than 5 Pascals (0.02 inches w.c.) depressurization. The valuesapplicable to spil lage-susceptible appliances are l isted in the Dp(depressurization) column, and are based upon building depressurizationof 5 Pascals (0.02 inches w.c.). The Dp column "u..oi b" used formechanically-ventilated systems that allow more than 5 padepressurization nor can spillage-susceptible appliances be installed inthis type of environment.
Currently the installation codes do not provide vent sizing for Category Ifan-assisted appliances and for spillage-susceptible appliances underdepressurization. These tables address this deficiency in the Codes.Values under the DP column applies only installations containingdrafthood-equipped appliance(s), or combinations of Category I fan_assisted appliance(s) and drafthood-equipped appliance(s). These tablesalso provide vent sizes for multiple vented appliances into a commonvent, and vent sizes for tile{ined masonry chimneys.
The Canadian Gas Association (CGA) and the Installation CodeCommittee thankfully acknowledge the research conducted by theCanadian Gas Research Institute (CGRI), and the independent researchsponsored by the Gas Research Institute to generate tirese tables. Theresearch_was conducted using a computer program VENT_II developedby Batelle. Recognition is given to both research organizations forallowing CCA to publish these tables.
For vent sizing requirements not contemplated by these tables, pleaserefer to the applicable installation codes.
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,/-
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA-8149.2-]${91
NATURAL GAS, AND PROPANE INSTALLATION CODES
DEFINITION OF TERMS
Category I Appliance - An appliance which operates with a non-positivevent static pressure and with a flue loss not less than 17 per cent.(Note: This category consists of drafthood-equipped appliances,
appliances labelled as Category I, and fan-assisted appliances foraenting into Type B aents.)
Category II Appliance - An appliance which operates with a non-
positive vent static pressure and with a flue loss less than 17 per cent.
Category III Appliance - An appliance which operates with a positivevent static pressure and with aflue loss not less than 17 Per cent.
Category IV Appliance - An appliance which operates with a positivevent static pressure and with a flue loss less than 17 Per cent.
DP - Refers to the maximum appliance input rating of a Category I
appliance equipped with a draft hood that could be attached to the vent,
when the appliance is located in a structure that may experiencesustained depressurization of up to 5 Pa. (0.02 inches w.c.); for example:
a tight structure, with a mechanically-ventilated structure.
Fan Assisted Conbustion System - An appliance equipped with anintegral mechanical means to either draw or force products of
combustion through the combustion chamber and/or heat exchanger.
FAN Min - refers to the minimum appliance inPut rating of a Category I
appliance with a fan-assisted combustion system that could be attached
to the vent.FAN Max - refers to the maximum appliance inPut rating of a CategoryI appliance with a fan-assisted combustion system that could be attached
to the vent.
-
AMENDMENT #1CAN/CGA-8149.1_M91 and CAN/CGA -Bl4g.2_Mgr
NATURAL GAS, AND PROPANE INSTAILAiiON CODES
NAT Max - refers to the maximum appliance input rating ol a CategoryI appliance equipped with a draft tooa *,ut "i"rJi" lu""r,ed to thevent. There are no minimequrpped appliances.
um appliance inPut ratings for drafthood-
FAN+FAN - refers to the maximum combined input rating of two ormore fan-assisted appliances attached to the co-mon v".t.
FAN+NAT - refers to the rmore ran_assist"a uppriu,,"luX'f; L:'y'l""XjT*,T"'Ji:ffi;"7appliance attached to the common vent.
NAT+NAT - refers to the maxirnum combined input rating of two ormore drafthood-equipped appliances attached to the'commln vent.
NR - means not recommended due to potential for condensate formationand / orpressurization of the venting system.
N/A - means not applicable due to physical or geometric constraints.
Flue Collar - That portion of an appliance designed for the attachmentof a draft hood, vent connector, or venting sys6m.
AMENDMENT #1CAN/CGA-B149.1-M91 and CAN/CGA -Bt4g.z-nlg7
NATURAL GAS, AND PROPANE INSTALLATION CODES
GENERAL VENTING REQUIREMENTS
All requirements contained in this document apply to both Categorv Idrafthood-equipped and Category I fan-assisted combustion appliances.At no time should a venting system for a l isted Category II, III, or IVappliance be sized with these Tables. The alternate sizinq methodsdescribed in the B149-M91 Codes may also be used to size the ventingsystem for a drafthood-equipped appliance. At this time, alternate siztnqmethods have not been developed for fan-assisted appliances, therefore,until engineering data is developed to allow alternate sizing methods forCategory I fan-assisted appliances, these vent tables shall be used.
1. The venting tables included in this instruction applv to vents andchimneys internal to the structure below the ,ooi i in". Exteriorchimneys or vents not enclosed by the structure or a chase belou. theroof l ine may experience continuous condensation, depending onlocality. A chimney with one or more sides exposed to the outside ofthe structure is considered to be an exterior chimney. A Tvpe B, orcertified chimney lining system passing through an unused masonrvchimney flue, is not considered to be exposed to the outdoors.
The "DP" column shall be used to determine the capacitv of a
venting system within a building constructed in accordance r\.ith thatdescribed in Clause 7.2.1.
2. If the vent or vent connector size, determined from the tables. issmaller than the appliance draft hood outlet or f lue collar. thesmaller size may be used, provided:
(a) the total vent height (H) is at least 10 feet;
(b) vents or vent connectors for appliance draft hood outlet' � i or i lur,collars 12 inches in diameter or smaller, are not reducetl nrorethan one tab le s ize (e .g .12 inches to 10 inches is a r rne_: rzereduction);
(c/
(d)
vents or vent connectors for appliance draft hood or t lue coll.rrsabove 12 inches in diameter, are not reduced more than rrrotable sizes, (e.g. 24 inches to 20 inches is a ttvo-size reductir)n r:
the maximum capacity l isted in the tables for a tan-assistedappliance is reduced by 10 per cent (0.90 x marimum capacit\.);and
3.
AMENDMENT #1
CAN/CGA-8149.1-M91 and CAN/CGA -8149.2-M9l
NATURAL GAS, AND PROPANE INSTALLATION CODES
(e) the draft hood outlet is greater than 4 inches in diameter. Donot connect a 3-inch diameter vent or vent connector to a 4-inchdiameter draft hood outlet. This provision does not apply tofan-assisted appliances.
For a single appliance venting configuration with zero laterallengths, note that Tables 1 and 2 are assumed to have no elbows inthe vent system. For all other vent configurations, the vent systemis assumed to have two (2) 90-degree elbows. For each addition 90-degree elbow, or equivalentn beyond two, the maximum capacitylisted in the venting table should be reduced by 10 per cent (0.90 xmaximum listed capacity) for a natural draft appliance, and 15 percent for a fan-assisted appliances.
* Two (2) 4S-degree elbows are equivalent to one (1) 90-degreeelbow.
If vent connectors are combined prior to entering the common vent,the maximum common vent capacity listed in the common ventingtables must be reduced by 10 per cent, the equivalent of one (1) 90-degree elbow (0.90 x maximum common vent capacity). (See Figure5). The horizontal length of the common vent connector manifold(L) should not exceed 1-"1/2 feet (18 inches) for each inch of commonvent connector manifold diameter.
If the common vertical vent is offset as shown in Figure 6, themaximum common vent capacity listed in the common venting tablesshould be reduced by 20 per cent; the equivalent of two (2) 90-degreeelbows (0.80 x maximum common vent capacity). The horizontallength of the offset shall not exceed 1-1,/2 feet for each inch ofcommon vent diameter.
Use sea level input rating when determining maximum capacity forhigh altitude installation. Use actual input rating for determiningminimum capacity for high altitude installation.
For appliances with modulating input rates, the minimum vent orvent connector (Fan Min) capacity (determined from the tables) shallbe less than the lowest appliance input rating and the maxrmumvent or vent connector (Fan or Nat Max.) capacity (determined
from the tables) shall be greater than the highest appliance inputrating.
i0 .
AMENDMENT #1
CAN/CGA-8149.1-M91 and CAN/CGA-8149.2-M9I
NATURAL GAS. AND PROPANE INSTALLATION CODES
A fan-assisted furnace may be common vented into an existingmasonry chimney, provided:
(a) the chimney is currently serving at least one drafthood-equippedappliance; and
O) the vent connectors and chimnev are sized in accordance withTables 7 and 8.
Single appliance venting of a fan-assisted furnace into a tilelinedmasonry chimney is prohibited. The chimney must first be lined witheither Type B Vent, sized in accordance with Tables 1 or 2, or acertified lining system.
Certif ied, corrugated metall ic chimney liner systems in masonrychimneys shall be sized by using Tables 1 or 2 for dedicated ventingand Tables 3 or 4 for common venting with the maximum capacityreduced by 20 per cent (0.80 x maximum capacity) and the minimumcapacity as shown in the applicable table. Corrugated metal ventsystems insialled with bends or offsets require additional reductionof the vent maximum capacity (See Note 5).
For muitiple units of gas utilization equipment all located on onefloor, available total height (H) is measured from the highest drafthood outlet or flue collar up to the level of the cap or terminal. Vent
connector Rise (R) is measured from the draft hood outlet or fluecollar to the level where the vent gas streams come together. (Not
applicable to multi-storey).
For multi-storey installations, available total height for each seg-ment of the system (H) is the vertical distance betneen the highest
draft hood outlet or flue collar entering that segment, and the centreline of the next higher interconnection tee. (See Figure 11)
The size of the lowest vent connector, and of the vertical ventleading to the lowest interconnection of a multi-storev svstem, mustbe in accordance with Table
-l or 2, lor available total height (H) up
to the lowest interconnection. (See Figure 12).
If the desired vent height and vent connector rise and/or lateral arebetween the table entries, l inear interpolation is permitted forcalculation of the permissible appliance input ratings. Extrapolationbeyond the table entries is not acceptable.
When vent table permits more than one diameter of pipe to be usedfor a vent connector or vent, the smallest permitted diameter ispreferred.
==,jL1===1.;,-:i' -
72
1 1 .
13.
74.
15 ,
AMENDMENT #1CAN/CGA-B149.1-M91 and CAN/CGA-8149.2-M9L
NATURAL GAS. AND PROPANE INSTALLATION CODES
November 1992
Nofe; The folloroing Clsuses extrscted t'rom the subject Codes haae been
amended to reference the releztant tables and figures of the
accompanying Vent Sizing Tables. Were reference is made to
Appendix B of the Codes, such ret'erence shall be interpreted to
mesn this document, being a replacement for Appendix B.
Clause 7.12.8 as revoked and substituted with:
7.12.8 The flue oI a masonry chimney that wil l
aent one or more gas-fuelled space heatingappliances with combined inputs of 400 000 Btuh(120 kW) or less, shall be lined in accordance with
7.12.10, except where
(a) the flue has an existing clay-tile or transiteliner;
(i) which is capable of removing the total
volume of fre gases to the outdoors, and
(ii) the capacity of the liner as determined by
the use of either Table 5, 6, Z, or 8 doesnot exceed the to ta l inpu t o f the
appliances to be connected thereto by
more than 25 per cent, and
(ii i) the existing l iner is inspected and
accepted by an installer under 7.72.2; or
(b) it is exempted by the authority haaing
iurIsdiction.
AMENDMENT #1
CAN/CGA-8149.1-M91 and CAN/CGA-8149.2-M91,
NATURAL GAS, AND PROPANE INSTALLATION CODES
Clause 7.13.1 revoked and substituted with:
7.13.1 Except as specified in 7.13.3, either a
Tent, or a chimney serving a single appliance shall
provide effective venting, and shall be sized either
(a) so that its effective area is not less than that
of either the draft contrcl derice outlet or the
flue outlet; or
(b ) in accordance w i th good eng ineer ingpractice, such as by the use of either
( i ) Tab le 7 ,2 ,5 , o r 6 o f Append ix B rvhen
the appliance is equipped with a draft
hood, or
(i i) engineered venting tables acceptable to
the nuthority haaing jurisdiction.
Clause 7.13.2 revoked and substituted with:
7.13.2 Except as specified in 7.13.3, either aaent, or a chimney serving more than one cp4rl1s116.,
shall provide effective venting, and shall be sizecl
either
so that its effective t 'Iue area is not less thanthat of either the largest draft control , lt ' i ie't
ou t le t o r the la rges t f l r re ou t le t . p lu . ;0 pcr
cent of the sum of the outlet areas of the
additional applitmce, or
i n a c c o r d a n c e w i t h g o o J c n { ) n ( e r l r {
practice, such as by the use of either
(i) Table 3, 4,7, or 8 of Appendir ts s'hc'n
the app l iances are equ ipp t -d r r i th . i ' , r t i
hoods, or
(i i) engineered venting tables acct-ptablc tLr
the authority haaitrg j u r isd ic t i o n.
( a. l
(b)
AMENDMENT #1
CAN/CGA-8149.1-M91 and CAN/CGA-8149.2-M9L
NATURAL GAS, AND PROPANE INSTALLATION CODES
Clatse7.21..2 revoked and substituted with:
7.2\.2 When a common gas rent is used in
accordance w\th 7.27.7, lhe gas appliances shall
(a) be installed in an enclosure having access
solely from an unoccupied space such as ahallway, service area or outdoor balcony;
and
(b) have combustion air supplied to the enclosureby means o f g r i l l s o r duc ts wh ich
communicate directly with the outdoors,sized in accordance with the requirements ofTables 7.2.24 or 7.2.28 and installed in
accordance with Section 7.3. See Figure 13of Appendix B for a practical meihod ofmeeting this requirement. Combustion airshall not be taken from inhabited or occupied
spaces within the building.
Clause 7.21.5 revoked and substituted with:
7.21.5 When a common gas aent is used inaccordance with 7.21..1, the common gas aent shall
be of Type B or Type L aents;
be sized in accordance with the requirements
indicated in Tables 3 and 4 and illustrated in
Figures 11 and 12 of Appendix B; and
be installed in accordance with the manufac-trrer's certified installation instructions.
(a )
(b)
(c)
AMENDMENT #1CAN/CGA-B149.1-M91 and CAN/CGA -8I49.2-M91
NATURAL GAS. AND PROPANE INSTALLATION CODES
TABLE 1Capacity of Type B Double-Wall Vents with Type B Double-Wall Vent Connectors
a
HeiShl
H (f0
\ e n t d n d V e n l L o n n e t l o r D b n e l e r D ( i n r h c t
3 5
Inout Ratine in fr.us.nd. of Rh'h
NAT FAN NAT FAN NAT NAT
L (ft) M r n l M a r I M a r I D P M i n l M a x l M a r t D P M i n I M a ^ I M a ^ l D P M r n l M a r i M a \ I D P
6 0
2
4
0 7 8 4 6 2 9
13 51 36 22
2 7 4 9 v 2 0
o 152 86 5318 97 67 4130 94 54 38
3 6 9 1 6 1 S
0 251 r41 87
27 157 105 64
39 153 103 61
47 149 im 59
0 375 205 127
32 232 157 96
5A 227 153 90
59 223 149 88
8 02
5
8
0 8 4 5 0 3 712 57 40 2923 53 38 27
28 49 35 25
0 165 94 6916 1W 75 55
32 103 71 s0
39 98 66 47
0 276 155 t1325 178 120 8842 171 715 82
0 415 235 172
28 263 180 131
53 255 173 723
l 0 0
2
5
1 0
0 8 8 5 3 4 2
t2 61 42 34
2 3 5 7 4 0 3 2
30 51 28
0 175 100 79
17 118 81 65
32 113 77 6247 1U 70 55
0 295 166 131
23 194 729 703
41 187 124 99
54 175 1'�15 90
o 447 255 20126 289 195 156
52 280 188 150
67 267 175 137
l 5
2
5
1 0
0 9 4 5 8 5 0
11 69 48 41
22 65 45 38
29 59 41 35
0 191 112 9615 136 93 8030 130 87 74
40 127 82 70
0 327 187 161
20 226 150 129
39 219 142 121
51 206 135 115
61 195 128 109
o 502 285 245
22 339 225 19449 330 2t7 184
64 315 208 1T
76 301 198 t68
20 0
2
1 0
1 5
20
0 9 7 6 1 5 5
10 75 51 46
21 71 48 43
28 64 44 39
34 58 40 36
48 52 35 31
o 202 1r9 10714 149 100 90
29 143 96 85
38 133 89 79
46 724 84 75
55 116 78 69
0 349 m2 182
18 250 166 149
38 242 760 142
50 229 150 134
59 217 142 126
69 2M 1v 1t9
0 540 307 27620 377 249 22447 367 241 214
62 351 228 2A3
73 337 217 193
84 322 206 183
30 02
5
t 0
1 5
20
30
0 100 64 609 8 1 5 6 5 2
21 77 51 50
27 70 5A 47
33 64 NR NR
56 58 NR NR
N R N R N R N R
0 213 128 119
13 166 112 104
28 160 108 100
37 150 102 95
44 141 96 89
53 132 90 847 3 1 1 3 N R N R
0 374 20 205
71 283 185 172
36 275 17ti 1t;1
48 262 171 159
57 249 163 152
66 237 154 1138 8 2 ] 4 N R N R
0 587 3$ 31218 132 280 260
45 42r 27f 2a7
59 405 261 213
70 389 2J9 232
80 374 23; 20
104 3.{6 2t9 2LU
50 0
2
5
1 0
2A
0 101 67 64
8 8 6 6 1 5 8
20 82 NR NR
26 76 NR NR
59 70 NR NRN R N R N R N R
N R N R N R N R
0 216 134 127
1 1 1 8 3 1 2 2 1 1 6
27 177 119 r13
35 168 114 108
42 158 NR NR
50 149 NR NR
69 T3] NR NR
0 397 132 220
14 320 206 196
35 312 200 190
45 299 190 181
54 287 180 t ; l
63 275 169 161
84 250 NR \R
0 633 b3 !5
15 19; t ] l :98
43 {8; T8 tcl
to l;t 29F :tltu t:5 lEs :;l;6 Sr t:E 2d
S l lLr 259 146
100 0
2
51 0
2A
30
N R N R N R N R
N R N R N R N R
N R N R N R N R
N R N R N R N R
N R N R N R N R
NR NR NR NIt
N R N R N R N RN R N R N R N R
O 218 NR NR
10 194 NR NR
26 189 NR NR33 182 NR NR
40 174 NR NR47 166 NR NR
N R N R N R N RN R N R N R N R
O 4 0 7 N R N R
12 354 NR NR
33 347 NR NR
43 335 NR NR
50 321 NR NR
59 311 NR NR
78 290 NR NR
N R N R N R N R
0 6i laD lll
40 i l ; %9 l i r53 il2 461 X362 528 l :3 t t571 5t3 H 12792 483 \R \R
1 4 7 4 2 8 N R N R
AMENDMENT #1CAN/CGA-B149.1-M91 and CAN/CGA-8r49.2-M91
NATURAL GAS. AND PROPANE INSTALLATION CODES
TABLE I contd.
Capacity of Type B Double-Wall Vents with Type B Double-Wall Vent Connecto$
Height
Vent and Vent Conne.tor Diaheter - D (in.hes)
9
Applianc€ lnDut Raline in Thousands Bfuh
NATFAN FAN NAl
I ( f i ) M i n l M i r l M , \ l D P M i n l M a \ l M a \ I D P M i n l M a . l M a ' l D P
0
2
4
6
o 524 285 1nu 32t 217 132
66 316 211 124
78 310 205 727
53
79
93
698 370 229
425 285 174
479 279 165
413 273 161
o 897 470 297
63 543 370 22693 536 3tt2 214
8
2
5
8
a7084
583 320 234
365 247 180
356 237 168
v7 227 161
0 780 415 303
50 483 322 235
83 473 313 222
99 463 303 215
0 1006 537 392
60 619 418 305
99 607 407 289
777 596 396 281
10 0
2
5
0
40
68
631 345 273
402 273 2r8
392 263 210
0 847 450 35648 s33 355 284
8r 522 346 277
104 504 330 257
0 1095 585 162
57 6U 437 16
95 671 446 357
122 651 427 333
0
2
l 0
t 5
o 716 390 33538 475 316 272
64 463 300 255
84 445 288 245
98 429 275 234
o 970 525 452
45 633 414 356
76 620 403 343
99 600 386 328
115 580 373 317
0 1263 682 48753 815 5& 468
90 800 529 450
116 777 507 431
134 755 491 417
20 0
2
5
1 0
1 5
20
0 T6 430 38733 531 346 311
62 519 337 300
81 499 321 286
94 481 308 274
0 1057 575 518
41 711 470 423
73 697 460 409
95 675 43 394
111 654 427 380
0 1384 752 6n50 917 612 551
86 902 599 533
112 877 576 513
129 853 557 496
145 830 537 478
l0 02
5
1 0
20
30
0 853 473 W27 613 394 366
58 600 385 358
n 580 377 &5
90 560 357 332
102 542 343 319
131 507 327 29
0 1173 650 60533 826 535 498
69 811 524 48791 788 507 472
105 765 490 456
119 743 473 4A
t49 702
0 1548 855 79s42 1072 7@ 651
82 1055 688 640
107 1028 668 621
124 1002 648 603
139 977 628 584771 929 594 552
50 0
2
1 0
15
20
a)
0 932 518 492
22 715 45 423
55 702 438 416
73 681 426 445
85 662 413 39297 &2 401 381
723 605 376 357
0 1297 70a 67326 975 615 584
65 960 605 575
86 935 589 560100 911 572 543113 888 556 528
141 844 522 496
0 1730 952 904
33 1276 813 772T t259 798 758
101 1230 773 734
117 1203 747 710131 1176 722 686161 1125 670 6i7
100 0
2
1 0
1 5
20
30
50
a 997 560 532
18 831 510 485
52 820 504 47968 801 493 468
80 782 482 458
90 763 471 47
115 72ta U9 427
180 651 405 385
0 1111 770 732
21 1155 7N 665
60 1141 692 657
80 1118 679 A5
93 185 66 633105 1073 613 620131 1029 627 596197 9{ a7a 516
0 1908 1040 988
25 1536 935 88871 1519 926 88091 1492 910 865
]F 1465 895 850
r22 1438 880 836119 1387 849 807217 1283 787 7$
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA -Bt49.z-M9l
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 1 contd.Capacity of Type B Double-Wall Vents with Type B Double-Wall Vent Connectors
Serving a Single
Ve.t rnd Vdt Com{tor Diameter D li..hpsl
10 1 2
Appliance Ratire in Thou$^ds oI Btuh
H ( '
\AT NA] NAT
Min M a r I D P M i n l M a \ D P v , n l M a \ l M a i D I
6 024
0 1121 570 35375 675 455 278110 6S 45 26128 661 435 257
0 1&5 850 527103 982 550 397t47 975 &O 37at71 967 *O 372
o 267 1170 725138 lK 8S g3
191 1338 8S 519219 1330 A70 513
0 2983178 1769242 1761
;I 919
170 ;11
8
;58
o 1%1 66 48271 770 515 376115 758 503 357
0 1858 970 70898 1124 745 W1g 1110 733 5207ao 1@7 720 511
D X71 194 Wlil 1543 1020 745199 1528 1010 717231 1514 1m 710
0 339 17{ 1t;0
1S 2030 lH q : !
:51 2013 13X q !
289 2m 1320 ! : :
10 0251 0
o 1377 720 *968 852 50 ffi112 839 547 438142 a77 525 410
0 20s 1m 83793 12e 850 m149 1229 829 63187 t2M 795 AA
0 2825 14$ 116
124 1713 1130 *
192 16% 1105 S4
23 169 10& &2
0 3742 tC25
t6 l 2a l je
243 238 1$l
298 2D t { {
i2 l
1 g
1 5 02510
| 1596 W 7263 1019 675 581105 1m3 ffi 561135 9n 85 5Q155 953 610 519
0 23S 1240 1S686 1495 9a5 U7
7q u76 967 a22ln 1&6 936 796202 ula n5 769
o 3323 1720 1179114 262 1350 1161182 2M1 7327 172An7 2W 1289 1W257 1976 12il 1M3
0 ff23 ziLr
1{ r - 271e l ;n
229 :6e6 l;dt
261 26aq l : l :
318 26 t l r6 : i
iq i2
r i x
I 1 a 5
20 0251 01 5
o 17% %o a3759 11S 755 #0101 1133 73 67130 1105 7r0 62150 1078 ffi 612167 1052 ffi 592
o 2637 1350 121581 1694 l1m ry135 1674 rV9 W172 lsl 1&5 930195 rffi 1018 S6217 1578 ry 881
0 3701 ]m 17tC107 2y3 1520 rU174 I20 1498 l33l220 282 ltr r2S248 245 1{2i t2d273 )11t 11q1 1)1-
0 Je{S 2i:a I6i
lt9 a!; 2urr iill
219 l i l 1 i : r : : (
2;l 1-'f lc+ 1:::
ab l4 i 1 . r : -
r l
30 02
1 01 520
0 1977 1%O 9%v 1351 865 ru96 1332 851 791125 1341 aA 771t43 1272 aO7 751t60 1243 7U 78195 1189 745 693
0 ro 1550 14274 2W 1310 1218i27 1981 1289 11991& 194 12il 176187 tru 120 1135207 1873 1185 1102?46 1807 1130 1051
0 4252 21;rt
98 27& 1&l
1& 2759 1- .
26 2716 t ; l l
237 2671 1691
2S 2613 161r
305 2555 rtua
l f t i
l 6 ; {
l b : l
i , l :a ] : :_ r -
12- b l l \ l i r
: t + 5 i : - Y
: : e + : _ : i t : t ,
l e l : : ! 1 - - \ '
50 025101 52030
041{1 1 8
t36
l5 l
183
2231 1195 11351620 1010 m16m 9% 961567 972 9231536 94 9011505 924 8781q5 876 832
0 341 182566 2431 1513118 24M 11951il 236 166rn 2327 1437195 288 108232 2271 1v9
420393365338
0 49& 2:1 2{:-186 A@ :ni :01e151 33& 2r0? t*:196 3332 2W i%l2 3285 20:b 19li2 4 3 2 3 9 t 9 E ; l i \ S287 31i l 1910 tSri
: - : j i a \ - _ r r
: ! r : : 5 : - r _ .
t r i + t - - - : - : -
lm25l 01 52030fl
0 249130 197582 1955108 1923126 1892141 1861170 1802241 16ff
1310 12451170 11121159 11011142 10851124 106t107 709t071 1017tm 9s
f; 3925M X27107 3m2142 2961163 2920181 2880215 2803292 2657
2050 19481820 17291803 1713IT5 1861747 1601719 1633163 1580
o 572972 4313
tft 42821& 4231Zft 4182D6 1133265 4037lfl 38%
29al2:il253121\l1ft92{3523ra2A
:$l
t{:l
l{(9
t-r:r
l *
l - l l b
! a
I I t :a : : . -
r l + r ! * r
: - + - i i : ' : . '
AMENDMENT #1CANiCGA-8149.1-M91 and CAN/CGA -Bt4g.2-trlgl
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 1 contd.Capacity of Type B Double-Wall Vents with Type B Double-Wall Vent Connectors
Sewhg a Single Category I Appliance
H (f0
leighj
Vent and Vent Cotu6ror Diameter , D i in.hes)
l 8 4 ,
L (f0
N"AT FAN NA] NATM i . I M a ^ l M a , I D p un l Ma^ | Mar I DP v ' . I v a . l v a x I o r M L n I M . ^ l M , ^ | D P
6 024
0 3m2225 250il 2242yl 2235
9& 1215ffi 903475 a70470 %7
0 4721 2430 1il7296 2782 18fi 11293m 2n4 1a35 708a7 2767 1820 1074
o 5737 29il 1a2M *n D0 135b9 3370 215 t30523 3K 2210 14
0 653 3520 218:426 40N %70 162l555 @3 260 1561618 q17 26fi ltu
025
0 4333 220 101212 25U 17n 1241311 2563 1685 11963V 2552 1670 11%
o 5s7 2750 2m274 3196 2170 t56398 3180 2m 1s450 318 207D 1470
0 655 3m 245s6 s82 2ffi 186476 3ffi &5 1S537 38il 2530 179
o 7aA q10 D2740r rc4 3050 22750 412 3W 2758s0 402 il30 21s1
l 0 02510
202mw
4782 2450 1%62m l8s 1512M9 1a71 A972818 lm 1€5
0 5955 3050 24102& 3556 2340 78ns2 35S 2318 1854459 3fi4 22ffi 177A
0 72V 3710 293319 4322 M 227:458 4il1 2818 %.5$ 46 27a0 2761
0 8s2 450 351{378 5t53 $n 27nw 5132 3371 %91@i 5@ i{n r6nc
1 5 025l0l 5
o 5678 29W 24941& 367 26 19M283 W2 U5 1Wy6 382 2193 1%4385 3S3 21S 1828
o 789 20 311329 4ru 28m 2S355 478 277 8649 A34 2739 B2a479 4192 27m '95
o 86 &10 379:2% 5232 y10 293:4% 9U 3U5 2a7,510 5159 3A3 2&:5A 5115 $m 2ml
0 10393 5m 45S36 6251 4m 35@501 6U M7 y8
59 6175 4019 y16
665 6129 39m S320 0
2
t 0t 5
0 6376 32fr 29253955 25m 23133926 254 2e3S0 25m 2253835 245 21943791 24n 2153
175270334372
0 D 8 8 m & y220 4916 3m Bffi$7 48a5 3774 288413 4835 3130 27&459 4786 3W 2750495 4737 Tg 2715
o 9785 498A W269 5983 3910 3s143 59S 3880 345489 5896 3830 rcy1 fi& 385 337fis 5792 i760 1U
0 117$ ffi &m327 7154 47ffi 42n475 7119 462 4149573 7%3 4ffi M631 7N7 4575 &72689 6953 4550 40$
l0 0251 0l 520
0 700 3770 3ffi159 4n4 n50 2837252 4701 n20 2W316 4U7 2970 2762354 4594 2920 2716& 492 %70 269M W 27a5 25%
o gyt 4750 u18199 5m 3810 3543312 ffi3 3783 3518s6 5803 3739 977431 574 %95 y36
67 566 Sil 3395ru 5574 3565 3315
0 11483 58S g1
247 7194 4il 432t373 7155 W 429t456 7W 4574 429507 7026 4527 42tCw @ & w 4 1 e635 M $75 4M9
o t3u8 7w Ma5 8617 ffi 5208439 8574 5552 5163535 8505 5471 50tr5S 8437 5391 S14639 8370 5310 4938739 889 525 4859
50 025101 520T
o an4 44n 4237t41 58& b70 3872U 5p6 3639 3457a5 5763 3585 3€6330 5701 35y 3357s1 5&1 g8t 3S7412 5523 y31 1)a9
0 11129 5635 5353171 7339 &X 439%3 7295 4597 4367355 ru4 4542 4315396 7155 4511 428583 7486 &79 4255494 6953 421 AW
o 13767 6940 6592D 89S 5695 541336 893 ffi4 537419 8855 5585 53065 4779 5% 526506 87U 55S 5235n a5a7 aut q17
0 15694 &S 80@251 10788 ffi 6517394 1An7 6818 UV491 10652 6749 &12542 70570 6770 63755& 1m8 670 6337672 l032a 6ffi 6273
1m
25101 520al50
0 im5 53m 5035120 7591 ffi 4X702ffi 798 45& 4338268 7478 4W 42a4
748 451 428330 7U1 4394 4174378 7209 4ZD 4M5486 6956 4S lMR
0 1!54 67m S65138 957 58m 5510245 95n 5769 W131n 947 5717 y31
358 9$7 tus 5382s7 9289 5613 5332q6 9136 55A 52A572 &t 53m s3s
169293374418452514659
817 8ffi 8l7l
1803 72m &l
1748 7162 ffi
1658 71m 6741
t569 787 ffi:
182 6975 621
1310 650 550{
@79 6ffi Q7(
20578 10m 9785142& 8800 836C14204 8756 831814105 8d3 824914m7 8610 81m139r0 8537 811013n0 a391 797113354 81m 7695
02Mul4364475n592
AMENDMENT #1CAN/CGA-B149.1-M91 and CAN/CGA -F�149.2-Mgl
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 2Capacity of Type B Double-Wall Vents with Single-Wall Metal Vent Connectois
a I
H {ft)
Vent and Vent Conne.to. D
l 5
Appliance lnDut kdns in Thouends ot 8tuh
FAN FAN I NAT FAN I NAT FAN I NAT FAN I NA]
M r l M a ^ l h l s
6 38 77 45 2A
3 9 5 1 3 6 2
NR NR 33 19
NR NR 3 ] 1A
59 151 85 53
@ 9 6 6 6 A
7 4 9 2 8 3 7
8 3 8 9 6 0 S
a5 zry 7Q 8?8 5 1 t r 1 & 6
142 l9 1A Q1 1 4 1 q 9 *
1% 3n ru 7?6
123 87 1% %
1 6 % l V %
t 8 n 1 $ A 7
1 6 W N 1 7 6
l9 320 213 1I187 313 2U 14M n 7 m 3 0 a
8 0
2
5
8
37 83 50 37
3 9 % 3 9 2 8
N R N R 3 7 %
NR NR 33 23
5 8 1 & 9 3 S
59 1S 75 55
77 7Q 69 49
a3 273 1g 172
a3 176 119 a7
107 1S 114 8 l
12 \61 707 76
1T 412 & 171
\21 261 lD 131
157 D 171 121
175 28 18 114
161 m 319 a3l$ 53 26 l&lB $2 S 167
u w u 1 f il0 0
2
5
37 87 53 4239 6t 41 3352 56 39 31\R NR 34 27
57 r74 99 785 9 1 1 7 U &
76 111 76 6197 lm 68 53
8 2 I 1 S 1 S
82 1% 18 7V
105 ls 12 98
tu 771 112 87
1 n M & m l
119 287 lq t$
1$ 2n 1% V9
1S 261 ]n 133
1 * f f i W 2 n
1S tr 22 2181S S 261 20
L5 0
2
5
10
t5
% % 5 7 4 9
3 E 6 9 4 7 q
5 1 6 3 U 3 7
NR NR 39 33
NR NR NR NR
56 1{ 11r 95
5 7 1 % 9 3 W
75 ln a6 73
95 116 79 67
NR NR 72 61
80 3Z 1& 1&m D 1 4 9 1 2102 216 lq 1191T 201 131 1111S 1& 124 16
116 49 28 28
115 87 D4 193
l4 T6 217 lU
\p M 203 173
20 2q \9 $3
1 $ 7 1 3 S 9
l€ 471 314 270
1E2 459 & 5
28 {S & 2{1
272 418 %9 D20 0
2
5
10
15
20
3 5 % 6 0 A
3 7 7 4 S 4 5
$ 6 8 4 7 4 2
NR NR 41 36
NR NR NR NR
NR NR NR NR
g 2m 118 lft
s 1 4 r y 8 9
n 7 q 9 4 W
93 129 86 77
N R N R & 7 I
NR NR NR NR
78 % 201 181
78 2S 16 149
lm 89 1$ t41
1 b r y \ # t n
155 2G 136 121
146 ly 126 712
114 fi7 % 275t13 375 28 B141 K 19 2131 T W 2 4 1 9216 U 210 1a7& % 1 % 1 7 4
t49 Z {8 R5
14 528 g l tO
t n 5 l 4 s 9
2 491 l t6 31
lff $9 x] :d
T
2
5
1 0
1 5
20
v q a 5 9
3 7 8 0 * 5 2
4 9 7 4 5 2 €
NR NR NR NR
NR NR NR NR
NR NR NR NR
NR NR NR NR
53 21r 127 718
55 1d 111 lm
72 157 76 I
91 lM 9a 91
115 131 NR NR
NR NR NR NR
NR NR NR NR
76 3n 219 &
76 87 18 170
98 T1 1n b7
1 2 8 1 A 7 %
151 29 1g 14
I81 Z NR NR
NR NR NR NR
110 g 3 3t ll W Q 9 2 n A
lft 417 271 L521 n p 7 8 r y
2 U 3 n 2 A U
2& 57 Ta 212N R N R N R \ R
l g & c 1 : 1 1 9
li5 a; li tar
;5
1 0
1 5
20
30
3 3 9 6 6 6 3
3 6 8 4 6 1 S
€ 8 0 N R N R
NR NR NR NR
NR NR NR NR
NR NR NR NR
NR NR \R NR
sl 213 133 126
53 181 121 115
70 174 177 111
89 lfl NR NR
112 14 NR NR
NR NR NR NR
NR NR NR NR
73 3% m 279
73 318 M 195
9 4 U 1 % 1 S
118 ry 186 ln
1S 2T 174 76a
176 57 NR NR
NR NR NR NR
1S 629 St all& 495 ll2 5131 42 15 5)162 &1 t2 2;t r y g r s : 6& { 0 r ; 5
315 3i6 NR \R
] i : t : s : t l
Il .:l !i' q
l : t i : r \R \R1m
2
5
t 0
t 5
20
30
NR NR NR NR
NR NR NR NR
NR NR NR NR
NR NR NR NR
NR NR NR NR
N R N R N R N R
NR NR NR NR
NR NR NR NR
49 ?14 NR NR
51 19 NR NR
67 1& NR NR
85 1E NR NR
132 10 NR NR
NR NR NR NR
NR NR NR NR
NR NR NR NR
69 43 NR NR
70 351 NR NR
q U N R N R
]13 324 NR NR
13 310 NR NR
1S 2$ NR NR
Z1 2& NR NR
NR NR NR NR
l0 69 l% t-
98 tut l; ta
1 5 5 5 1 h S
ls 5 l l a3 16
24 S7 \R \R
T l S \ R \ R
N R N R N R \ R
15 s 1! r\l
11 5r a r 1 -6
H ;d lit !9
::0 -c {$ 115
155 $ i \R \R
{ i l \ R \ R
AMENDMENT #1CAN/CGA-B1.49.1-M91. and CAN/CGA-8149.2-M91
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 2 contd.Capacity of Type B Double-Wall Vents with Single Metal Vent Connectors
S€
Height
Vent and Vent Conn(tor Diameter - D (inches)
t 0
ADDllance Input Radne in ftousands of Btuh
FAN NAT FAN NAT FAN NAT FAN NAT
L ( O
6 271 6% X9 D
m t S 2 u t n
87 416 m 1A
2 8 M T t \ 6
267 a% 69 Dl
% 1 9 1 W 2 4
, 5 S m 2 r 2
n 7 9 6 W m
371 1118 W 5
w 03 63 276
M & 8 2 6 r
& 9 & & 6
fi7 1639 U9 96
4 % W f f i 3 %
g q t f f i v 6
f f i w 0 7 v a
M m 4 r 4 m
1 9 4 2 n 1 U
2$ 470 311 nl
a 1m2 s 391
2& 617 417 M
w & M n 7w 9 1 3 q ) n
m i 2 5 7 f f i @
T9 78 513 374
4 l 8 E f l S
q o T q M w
521 1852 %7 7M
s 1120 74 Wg 11& m 518
6 1089 715 S
10 m 2 w 4 9 3 $
193 S1 B 2ffi
241 518 W 2T
5 1 @ 3 S 6 1
2 4 8 1 & W
9 g 8 g
5t 1373 718 %7
T 2 U 9 f f i U 7
M W W &
fl7 2031 1057 S5
4re \24 ru ga
s 1224 85 ffi
l 5 0
2
5
1 0
1 5
195 % 52 4m
187 A1 413 3S
B 1 6 6 q W
M W f i \ 3 2 4
9 f f i w 3 1 2
2g 1259 Sl ffi
w a 1 2 w 4 7
2 a 7 M e 6 W
4 9 7 6 n 1 %
& 7 4 & 4 1 1
& 1591 g 2l
319 1015 6n 5n
3 9 W 8 f f i
4 7 4 % f f i 9
w 9v a1 511
s 237+ 7237 109
$7 l49t %3 &5
w 1469 %3 E19
& 1433 9a n9
m 1 3 9 & 7 &
z0 0
2
10
l 5
20
r{ 1053 5n 516
w M 6 A 1
D 4 6 9 r y W
2 n f f i r y w
% f f i 4 1 9 3 n
374 616 ffi 3*
a 1379 7g 675
27 914 611 ffiD & 9 f l
B9 ffi 570 fl7
393 ffi !9 49
s 810 526 6
v6 1751 W W
w \ 1 & r u 6 D91 1126 7y I
4 9 1 0 9 M f f i
2 6 1 W 6 n f f i
w lon $1 5n
g3 2631 13& 1211
w 1tr9 1F8 S
97 t665 7074 95
ffi 1626 1037 %
m 1587 1m5 894
30 0
2
5
1 0
1 5
20
\ U 1 1 6 W &
175 W 53 4%
215 & 521 S
2 $ m * \ w
312 7il 8l W
f f i 7 n $ 1 A D41 67n 06 1*
D l W W M219 169 ffi &9
269 1M9 & A6
327 7017 62 616
3 D S f f i g
s 955 615 52
i l 1 f f i 5 7 4 w
%
%
wffig0
7M
1971 10% %2136 rc &3
1324 W n7
1247 At 7&
t25t M ru
216 7A n4
1147 m 670
Q4 199 t3G 1216
94 1971 12S 1193
QO t927 1243 l\X
m 18& 1205 1121
ru 1841 1156 r0&
937 1759 1101 1024
50 0
2
5
1 0
1 5
20
30
176 1292 7M @
1S 971 613 ffi
r a 8 f f i 5 n
5 % S 5 g
B 8 v W 5 U
3 5 M t r 5 1 6
4 2 W W 4 n
20 1n4 W %r
N 1273 81 n0
E7 7252 M 755
313 1217 76 n7
K il83 7& 69
415 1150 7G 6Z
521 1086 &9 617
295 23 1189 1130
m i615 1007 957
a7 1591 91 ql
418 r55r ff 915
41 1512 g S7
9 1 4 2 r y & 1
674 13ry ffi S
aa u32 la1a 1727
s1 2426 lW 1434
4% 2396 14S i416
s9 2347 146 1382
6 229 141 13S741 2251 1387 1318p2 2159 1318 1252
1 m 0
2
5
1 0
1 5
2A
30
i0
16 1404 76 n7
ls 1152 6S ffi
194 114 ffi &
5 1 lU 62 65
a1 1075 ffi 6T
34 tru 69 il7
418 W NR NR
617 tu r_R !_R
207 lm tOI ql
i% 1532 933 &
2{ 1511 21 E75
a3 1177 W ffil
w 1 g 3 & m
391 r4r0 H 821
{9r r !1 E2{ I: r r l :0- \R \R
T3 2479
89 1970
32 1945
s9 t{5
47 1865
a7 186
s1 17{t
i95 1591
r3m 1r5i 1 f l 1 1 1 0
1153 1@5
1133 1076
i l10 1055
t087 1033
lU1 S9
N R N R
395 3912 2042 19&
371 3021 1877 7726
6 2W 17% 17M
y7 2938 178 1675
618 2888 17S 164
6m 2838 1696 161l
& 2739 1627 Itu
1 l$ 2547 1489 t4 t5
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA -B�149.2-NI{97
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 3Capacity of Type B Double-Wall Vents with Type B Double-Wall Vent Connectors
Vent Ca
Two or More Catesory I
H (fo
vent Connecto . D iamet€r D Unchc5)
1 5
Appliance Inpui Rating Limits in Thousands of Btuh
NATFAN NAT NAT \ATFAN
R f o M , ^ l M - . l v , . l n n M L n l ^ ! d r l \ i r . l D r
6 22 37 26 1623 41 3i 192 4 U 3 5 2 1
35 66 46 2837 75 55 3438 81 62 38
46 106 72 4448 121 86 5249 132 96 59
58 1& Ill 6360 183 t2t ;66 2 1 9 1 ) 9 S i
2 4 4 2 7 1 9
2 3 U 3 2 2 3
24 47 36 26
35 72 48 3436 80 s7 103 7 a 7 & 4 5
19 114 76 5157 728 90 e53 139 101 72
61 176 tOc 7766 195 129 el
6 7 2 1 0 t l a l i ) :1 0 I
2
3
22 43 2a 2223 47 33 26
24 50 37 29
34 78 50 39& 8 6 5 9 1 6
37 92 67 \2
49 123 78 61s1 136 93 73
52 146 lM 81
65 189 ] l .1 �
67 206 111 llli
69 20 ta i r I17
21 50 30 2622 a3 35 3024 55 40 34
33 89 53 4535 96 63 5436 102 71 60
47 742 83 7149 153 99 a4
51 163 111 94
# 220 1:0 l i t :66 215 112 t :168 21E 160 1t6
20 21 54 31 2822 57 37 3323 60 42 38
33 99 56 50& 105 66 5935 110 74 67
46 157 87 7818 167 1M 94
50 176 116 104
6 2 2 4 6 ] : i l t l
d 2 5 9 l j e t !
66 2 / '1 lbs l : l
30 20 62 33 3127 ta4 39 3622 66 11 41
31 13 59 5518 70 6523 79 73
45 181 93 8647 790 714 10248 t98 124 115
60 2EE tt{ t : l62 l9 r :r ! :g l fF l ; \ is
50 19 71 35 3321 73 43 41D 7 5 4 8 4 6
30
32
33
33 61 61
37 76 72
41 86 82
13 216
15 223
46 229
0r 9619 113u 127
57 3J9 ui : r \5 9 l a 6 l : l l n l61 366 tcl :q
100 18 82 37 3619 83 44 1320 84 50 49
28 158 66 6530 161 79 77
3'�1 163 89 87
40 262 1U 102
42 267 123 121M 272 134 13a
5 3 { 2 l l , ' I i -
ommon
Heigh l
Common Vent Diameier - D (inchcs)
Combined Appliance lnput Ratine in Thousands oi Btuh
i l N I F N
I . : l ^ : l : : l l ^ : l : : _ l92 8 l 65 40 140 116 77 103 6: 201
8 101 90 52 155 729 92 111 8l 2 2 1 l ; S l : n l h l : : "
1 0 110 97 76 79 62 164 141 110 I2S 97
1 5 r25 112 91 77 195 164 139 t44 122 283 2 :E le { lL !
20 136 123 111 r02 92 215 183 165 160 IU 114 254 l l l r : : !
30 152 138 1 2 8 1 1 8 i l o 241 210 195 18s 172 161 29/- 2;6 2s :l
50 167 153 147 ty 129 279 244 2y 214 205 421 3:3 3lq tla :q.
1m 175 lb l tbo NR N R l t l 277 271 NR NR 489 421 413 NR \R
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA-8149.2-M91
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 3 contd.Capacity of Type B DoubleWall Vent with Type B Double-Wall Vent Connectors
Two or More
H (ft)
V e n t ( o n n k t o r l l
7 8 9 1 0
ADDliance lnDut Ratins Limits to Thousands of Btuh
R (fo
N A T F A N N A T F A N N A T N A T
M i n I M a \ l M a r l D P M i n l M a r l M a \ l D P M i n l M a x l M a r l D P M i n l M a x l M a r l D P
6 n 225 142 87
79 253 168 102
82 275 189 115
92 296 185 1L3
95 333 220 134
97 363 248 151
10 376 237 145
772 424 2p 172
774 463 377 193
128 466 289 176
131 526 v5 27Q
134 575 386 235
u 2a 148 105
a6 269 775 724
tm 320 194 138
103 356 2m 163
118 n8 248 176727 4A D4 209
138 507 303 215
141 564 358 254
l 0 89 257 t54 L20
91 2U 182 142
106 341 200 156
t0 374 238 186
125 436 E7 2M
128 479 305 238
146 U2 314 245
149 596 372 290
88 298 163 139
91 320 193 164
110 389 214 182
112 419 253 2L5
134 493 273 232
137 532 323 275140 565 355 310
162 6tD 333 283
165 658 394 335
20 86 334 171 154
89 354 202 182
91 371 228 205
t07 436 224 m2
t10 463 265 239
1r3 486 300 270
131 552 285 257
134 587 339 305
737 678 578 46
158 681 U7 312
161 725 414 373
1& 7& 466 419
30 83 391 182 L69
85 408 215 2W
88 423 242 225
t03 5"t2 238 221r05 535 282 262
108 555 317 295
125 649 305 2U
129 679 3Q 335
132 706 405 377
15L 802 372 346
155 840 439 408
158 874 494 459
50 78 4n 197 187
81 490 234 222
83 502 263 250
97 627 257 24
r00 e5 306 291
103 661 343 326
120 797 3n 314
123 820 392 372
126 U2 441 419
Ig 9& 403 383
148 1014 478 454
I51 1043 538 511
100 73 611 2M 2U)
75 619 242 237
78 627 272 267
91 810 266 261
94 a22 316 370
97 8U 355 v8
112 1038 341 33
115 1054 S5 397
118 1069 455 s6
t35 1285 417 4B
t39 1306 494 4U
t42 1327 555 5e
Common Vent
Common Vent Diameter D (inches)
7 8 9 l 0
ANI FANI DP lNAr l
DP
FN | +NAT | (f+N) l+NAT I lN+\ :::l:|::l::]:::l:::l::l:l:::::l '::l :: I l::l ::6 w 2 4 t s t N 1 2 & 1 t4 lq 24 19 g7 4! 265 135 I 62 51 117 {10 5
8 w 2 n 7 % u 1 * 4 W 2 4 7 A M @ s x l 3 f t 2 S ;{ 7 {r0 $i 1T
l0 x 7 M n 3 2 4 r p 4 n v r y 3 1 5 2 $ d 9 5 2 t r S 1 1 6 & 6 t s t F s
0 7 \ 9 M N A 5 * @ m w 1 \ a - t 6 t : 5 1 6 q q l a t s a i s
4F ]q 155 310 2D 621 49 49 S Ai g I 6tq i:? 1l ltta q _! 4t i6
w 4 9 A 7 W 3 T 2 0 s s 4 m { 3 : r y $ - : { T a l - r - $ t a
s & 1 1 7 % U & &q 7ft 6T ia i3 : :4 - cs *J : - L i t I $ I $ H S
l 0 E 1 S S { D @ r0l5 r aa 65 at: ! : r : : : : : : ' : l I a S l e l l : s %
AMENDMENT #1CAN/CGA-B149.1-M91 and CAN/CGA -B�r4g.z-trlgl
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 3 contd.Capacity of Type B Double-Wall Vents with Type B Double-Wall Vent Connectors
Two or More Categorv I
H e i E h t
H (f0
Vent Connector Diaherer - D (inche,)
1 2 74 7 6 1 8
Appliance Input ktins Limits in Thousands of Btuh
R ( 0
NAlFAN NAT NATFAN FAN NAT
M a r l M a \ l D P M r n l M a ^ l M a ^ l D P M , n I M a . l M a \ | D p M i n l M a \ l M a DP
174 7& 4% il31& W7 676 376
N/A N/A N/A N/r'
u 1 0 6 6 3 S
m 7 2 3 1 W W
{/A N/A N/A N/A
281 1371 ffi 5m
E7 1617 1081 @
N/A N/A N/A N/ I
% l7n 7080 {fs2 2069 1370 8$
N/A N/A N/A N/A1& 82 516 6l q w M 4 5 7
1 % 1 0 S Z S
2T 1126 6% 4%z4 1307 W ffin 78 n77 7&
2% 1478 9tD ffiru l7r9 11S 817313 7%2 73q W
ffi 1920 ll$ 8173n 221t 74& 1A37w 2& 1770 1257
l 0 l% 870 536 418201 ry @ 51aM 185 p 618
249 1195 m *95 1377 924 n72A 156 1118 8n
311 1570 W 7S318 1& 1205 %35 1989 1455 1135
38 2049 1205 W387 2332 1535 1197395 2556 i865 1455
r5 zt4 %7 ffi €3
27 1%5 712 ffi
2 1 1 8 1 & r u
n 1 3 y H 6 n
279 14q 1m6 855& 1632 1222 rntq
3ft 17& 1030 876w 197a B2A tlz51 2157 1610 1%l
ffi 2317 1305 tiF
416 2579 1663 1115
e1 2796 2025 | /'2120 u
2ro237
1051 g 1%
1162 78 03
r53 ry 810
Et 1&3 W 76298 1597 1K 9S{7 1726 12Aa 11*
$7 1911 1095 9&ffi 2116 1395 iS63n 2287 1695 1526
45 2533 13854fi 2778 176a4S 29& 2r4a
217
s 216
u217 62 g
116 m n74 m $ 2 S
M 76& 910 W294 1802 t7@ 1079s3 1920 1410 l3l l
w 2183 llq 1707376 236 1510 1{43U 2V4 183A 7702
sr 2891 ]il474 3110 1920
6 329 23{
{ l l
s 26 1479 @ 6213 1561 m 81721 1631 1031 W
2n 20n 1M7 95781 2739 1297 7226N T42 1575 1496
m 2659 1315 124939 28i4 1685 10159 2951 2055 1952
{35 3il 1tu5 li6l
47 IZI :85 :0:8
61 1893 2mi tr:i1m 19 1923 712 ffi
2m 19& ffi 8702G 2035 r0& 1043
& ztu 10il 102928 2731 7% 13t9n 2a11 t&2 rdg
326 y{ 1370 1s33% 3&6 17@ 1725% 3714 2150 2107
w 17Ai 1i{
414 S42 I{l
€6 {9S ::m
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA -8r49.2-M9r
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 3 contd.Capacity of Type B Double-Wall Vents with Type B Double-Wall Vent Connectors
Senins Two or More
Vent Conne.to. Diameter ' D (inches)
20 22 24Appl ian(e lnput Rat inq in Thou lands o f B tuh
NAT FAN NAl FAN NAT
M ' n I M a \ l M a \ | D P M i n l M a r I M u ' I D P M r n l M a \ l M a ' l D r
6 N/A N/A N/A N/AN/A N/A N/A N/AN/A N/A N/A N/A
N/A N,/A N/A N/AN./A N/A N/A N/AN/A N/A N/A N/A
N/A N,/A N/A N/AN/A N/A N/A N/AN,/A N/A N/A N/A
8 N/A N/A N/A N/A477 2737 1800 127a478 3018 2180 1548
N/A N/A N/A N,/A560 3319 2180 1548568 3665 2640 1874
N/A N/A N/A N,/A662 3957 2590 1839669 473 3130 ?2?2
1 0 N/A N/A N/A N/A4% 2887 1890 1474494 3169 2290 17A6
N/A N/A N/A N/A581 3502 2280 1n8589 3849 2760 2153
N/A N/A N/A N/A686 4775 2710 2771694 4593 327n 2SS1
1 5 N/A N/A N/A N/A523 3197 2060 1751533 v70 2510 21U
N/A N/A N/A N,/A624 3881 2490 21776U 4216 3030 2576
N/A N/A N/A N/A734 4631 2960 2516743 50S %m $50
20 N/A N/A N/A N,/A554 3447 2180 1962
567 3708 2650 2S5
N/A N/A N,/A N/A667 4190 2630 2i67
671 4511 3190 2871
N/A N/A N,/A N/An2 5005 3130 2a77785 5392 3790 y11
30 N/A N/A N/A N,/A619 3840 236s 2199
632 4080 2875 2674
N/A N/A N/A N/A728 4681 2860 2660741 4976 3480 3236
N,/A N,/A N/A N/Au7 5606 3410 3171860 5961 4150 38m
50 N,/A N,/A N/A N/A580 4ffi7 2633 2501594 4808 3208 3048
N/A N/A N/A N/A7@ 5569 3185 3026724 5826 3885 3691
N,/A N/A N/A N/A
851 6633 3790 3601867 6943 4620 4389
100 N/A N/A N/A N/A523 5982 2750 2695539 6143 3350 32a3
N//A N/A N/A N/A639 7L54 3330 32636U 7453 4070 3S89
N/A N/A N/A N/A769 8650 3950 3871786 889 4810 4774
ommon Vent
Common Vent Dameter - D (in.hes)
20 22 24
Conbind ADDlian€e InDut tutins in Thousands of Rh,h
::l::l :: | :i: | : F A N I F A N I o " l " ^ r l
o "r F N l - N { T | ( F + N ) l , N A T I i N + N l
F A N I F A \ l m l N A r l D f+ F N I + N A T I i F . N ) I , N A T I { N . N )
238 2180 1330 1tu0 1013 348 2677 1A3 $70 1n2 42% 326 19S 23q t4S
8 3162 2439 1732 1%O 1321 38S zq\ 2129 2?M ]*t 4695 3616 2%7 2680 1{3
10 w 2665 2079 2030 1$3 4241 3274 2557 2N 1A7) 4123 )957 1086 2920 D7a
l 5 q26 3133 2663 Z@ 2m6 4971 3852 3283 27q )77) 6016 670 3970 ro 28S
20 4W 3552 3197 2W 2376 5573 4352 3917 3120 2m8 674a 5261 4715 l8m !20
5S3 4193 3899 3110 2892 6539 5157 4796 360 3A2 79& Q47 5810 q80 4l&
s 6S7 524 SS 3m 3ffi E116 6458 62m 4ru 4320 9437 7813 7ru 175 52ft
1 m 8597 6986 S46 m 4m tffir 8fl8 &75 5920 5rc2 lro lury 1089 72m 70$
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA -B�149.2-Nl9t
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 4Capacity of Type B Double-Wall Vents with Single-Wall Vent Connectors
Serving Two or More Category I Appliances
N R N R 2 6 1 6
N R N R 3 1 ] 9
N R N R } 2 1
NR NR 46 28
N R N R 5 5 A
R N R 7 1 4 3
R N R 8 5 5 2
NR NR 102 62ts 182 123 75174 198 138 &
207 223 140 8a215 251 167 1A2
NR NR 29 25
NR ^-R s 29
7 9 8 7 5 2 4
E3 94 62 538 7 l m 7 0 0
115 1$ 81 69
121 150 97 82
ln 214 116 99185 2$ r38 117
38 291 158 1A245 314 189 161
4 7 4 3 t 2 9
50 62 37 34
77 110 57 5381 115 67 62a5 119 76 71
113 175 89 83
117 185 16 I
t69 274 129 120
tn 290 152 141
26 380 175 t63236 397 208 r93
46 69 33 3219 77 40 39
7 s 1 2 8 0 S
79 t32 72 7083 136 82 &
r 1 4 2 1 5 1 1 3 1
162 336 137 133r70 345 1& 159
217 M 188 18226 473 D3 21685 16 2a2 2e
Common Vent
i (ft)
Common Vent D',melcr
Combind Appliance lnput Ratine in Thousands of Bhrh
" ' l ' * t ' t ' - l -F N I i N A T I L F . N i + N N T I N ' N
^ t ' * l ' t ' - t *r d N l - N A r l F - N L L r r I " - N
" ' t ^ t ' t ' - t " 'F N I + N A T I i F + N I I - N A ] I I N + N ;:l:^.1 , . l^-
6 8 9 7 8 4 8 d 3 C 136 113 69 lm 61 2m 158 96 r4 S ru 2g t{9 rq6 l la
9 8 8 7 4 7 1 i l 151 126 89 112 80 218 i73 r23 159 113 331 269 191 l ta l
Itl 106 94 73 76 59 t63 137 tA7 120 94 237 189 147 174 136 357 292 l:! 2i6 tU
l 5 21 108 92 88 75 189 159 135 14 119 275 227 Ba 2n 17A {16 X l :C2 2 :J t t l
20 r31 118 l f t 98 S m8 ln 159 155 14( lo5 247 2D 271 2A1 63 $3 !5 il: t;:
s 145 132 12 113 105 n6 2n 188 1n rc6 \50 286 26 2s7 239 5 l l t r t i : _ . to r i i
50 159 145 139 128 123 268 2T n4 2M 196 46 337 324 296 2U 62 529 18 lt,r iq1
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA -8149.2-I[I{9L
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 4 contd.Capacity of Type B Double-Wall Vents with Single-Wall Vent Connectors
Serving Two or More Category I Appliances
Connector
H (ft)
Vent Conne.to. Dameter D (inches)
Applian e Input ktine Limits in Thousnds of Btuh
NAT NAT
M i n l M a r l M , ' I D P u i n l u a r l u , . l o p v i " l u , , l u , . l o n
6 262 293 183 112
271 331 219 ly
279 361 247 151
325
34
373 2U
n % 7
62 316
143
771
193
47
458
464
463
524574
2K 174
3& 210385 235
1 5 312 3& 2S 1n
321 4t1 24 211
331 438 281 239
397 S2
407 522
418 557
26 26
317 %9
30 3M
556 596 324 275
tr tu 347 329
579 6q 437 371
30 296 497 21 274
s7 521 274 255316 il2 3@ 287
374
389
m
s062690
294
349
394
325
366
52n 779 358 333gl 819 425 395555 855 4a2 4
50 244
a4
u
ruffi
ffi
245
293
331
2382U321
3& 764 314 305
376 D3 375 M
347 816 424 411
fi7 951
520 9S
535 1013
3&4S518
3n
302
Vent
leigh
Conmon Vent Danebr D (in.h6)
:ombined Appliance Input ktinq ir Thousands of Btuh
* t ' * l * t * ' t -rFNl +NAT | (t 'N) I +NAT I LN+r)
' * t " " t * t ' " t *+Fs I |NAI I lF+N) | +NAT | (N+N)
* t ' * l - t . * t *+ F N I r N A r I r F + N r l i N A T l , N + N l
6 398 310 189 257 157 s1 a9 20 332 203 65 515 314 407 24a
8 4X 342 28 245 2A 592 473 $6 373 265 7n 559 & 46 727
t 0 t67 369 288 3B 241 65 512 399 398 310 747 617 481 487 380
l 5 tu 4U 369 357 3A3 7X 59 S 4% 388 905 71a 610 553 470
20 ffi 447 434 395 3$ 424 673 ffi 512 461 10ll 408 72? 06 *l
703 570 530 459 427 958 7 735 593 551 1183 952 885 723 672
50 833 686 659 535 514 1 139 9g 9t6 S9 6l 1418 1157 ] l i l 8$ ru
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA-8r49.2-M91
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 5Capacity of Tile-Lined Masonry Chimney with Type B Double-Wall Vent Connectors
Vent Connecto. Dhmeter D (inches)
N/A N/A 172 t5l
N/A N/A 19 ri2
N/A N/A 76" 71'
N\/A N/A 671 62r
N/A N/A 128" r19 '
\ / A N / A 1 1 5 . 1 0 7 .
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA-8149.2-M91
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 5 contd.
Capacity of Tile-Lined Masonry Chimney with Type B Double-Wall Vent Connectors
Seruing a Single Category I Appliance
vent Conn{tor Diameier D (in.hes)
Io h usd with.hmn€y ar€as within the size l imits at btlor
10 12
{pDlian.e lnput ktine in ThoGands oi Bhh
NAl NAf
M i n l M a ! l M a ^ l D l ' V , n l M , . l M i . l D P DP M i n l M a \ l M a , I D P
l6 \/A N/A 320 r89 N/A N/A €1 87
N/A N,/A 376 ry
N/A N/A Sr g3
N/A N/A $1 $1
t 0 N/A \/A 2% 218
N/A N/A 27 2V
N/A \/A 2S r87
N/A \/A S I
\/A \/A $5 26
\/A \/A g2 26
\/A N/A 491 N
N/A N/A 6 ru
N/A N/A g 3I5
N/A N/A 2l 529
N/A N/A n2 520
N/A N/A d 474
1 5 I
5
l0
N/A N/A 33 289
N/A \/A 313 2@
N/A N/A 2% t1
N,/A \/A 41 3n
N/A \/A 416 S
N/A \/A 394 S
N/A N/A 375 319
N/A N/A $2 S
N/A N/A S 4$
N/A N/A $7 €2
N/A \/A S 412
\/A N/A &r 23
N/A N/A 86 712
N/A N/A Z @
N/A N/A 742 d3l
20 2
5
10
15
N/A N/A 375 B
N/A N/A 3S 115
N/A N/A 32 n5
N/A N/A 314 279
N/A N/A 49r 42
N,/A N/A 6 417
N/A N/A S 39
N/A N/A 418 3n
N/A N_/A 397 S3
N/A N/A 627 fu
N/A \/A sq $7
N/A \/A k S
N/A \/A gl 41
N/A r.'/A 513 457
N/A N/A $3 S8
N/A N/A 93 M
N/A N/A 8D 7P
N/A \/A M 7€
N/A \/A W 77A
30 2
5
10
l 5
20
$
N/A N/A 421 I
N/A N/A 393 5
N/A N/A 3r U7
N/A N/A 5 3}
\/A N/A 332 S
N/A N/A 288. 2d.
N/A N/A 5S 519
N/A N/A 526 49
N/A N/A il 65
\"/A N/i 476 S
N/A N/A lil i19
N/A N/A 416 37
N/A N/A 717 67
N/A N/A 63 S
N/A N/A d @
N/A N/A 621 5n
N/A N/A 92 $l
N/A N/A 55i sr6
N/A j " /A 1112 10&
N/A N/A i@4 r0r7
N/A N/A 1025 953
N/A N/A %l 912
N/A N/A 4 a74
N/A N/A aZ 316
i0 2
5
1 0
l 5
20
N/A N/A 47 4S
N/A N/A 45 I
N/A N/A 124* 43'
N/A \/A {0a S0r
N/A \/A 376. $Z
N/A \ /A 3271 31 l r
N/A N/A A3 Ot
N/A N/A 5% tu
N/A N/A $7 539
N/A i\/A s39' 512'
\/A N,/A 5111 4851
\/A N/
4d. {!5i
N/A N/A 8 i2 m
N/A N/A 24 7$
N/A N/A 73 &
N/A N/A 702 67
N/A N/A &9' &,
N/A N/A 623" 592'
N/A N/A 1243 1180
N_/A N/A 125 l l&
!v/A N/A 1147 l(A)
N/A N/A r@ ] ru
N/A N/A 1050 98
\_/A N/A ry 935
63 95 132
152 {5 5S 9
I Possibil iS oi.onrinuols condensation
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA -8149.2-]NI9l
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 5Capacity of Tile-Lined Masonry Chimney with Single-Wall Vent Connectors
Serving a Single Cate
H ( 0
Vent Connector Diameter - D (inch€s)
ADoliance Inout Ratine in Thou.iands of Btur
FAN I NAT AN I NAI T A N I N A NAI
2 \/A N"r\ 52 31 N/A N/A 36 51
\/A N/A 31 43
N/A N/A 130 77
N/A N/A 116 63
N/A N/A 130 ] to
t 0 2
5
l0
N/A N/A l t2 74
\/A N/A 95 69
N/A N/A 16r l t3
N/A N/A r47 r07
N/A N_/A 22d l. l
NIA N/A 2ni 113
5 2
5
l 0
1 5
N/A N/A 113 97
N/A \_1A lG 91
N/A \/A 96 82
\ /A N/A r73 r53
\/A N/A 163 140
N/A N/A 151 123
N / A N / A r 1 1 7
N/A N/A 24e z l r
\/A N/A 2$ l9S
N/A N/A 2tl 131
\ /A N/A )93 163
20 2
5
1 0
20
N/A \/
NR NR
N/A \ /A 123 111
N/A \ /A r r5 r&
N/A N/A 105 ' 93 '
N'/A \_/A 95' 35'
N/A N/A 30a 7r i
N/A N/A 2m 130
N/A N/A 133 165
N/A N/A 170 t5 t
N/A N/A 1a 139
\/A N/A 273 24b
N/A N/A 252 t2:
N/A N/A 235 2@
N,rA N/A 217 re l
N/A \ /A 2 i? r !11
il 2
5
t 0
t 5
20
N/A N,]A \R NR
N/A N/A 136 126
N/A N/A 1271 il8!
N / A N / A 1 1 3 . 1 0 5 '
N/A N/A 1051 931
N/A N/A 83 . 82 .
N/A N/A 215 200
N/A N lA t% 132
N / A N / A 1 3 2 . 1 6 9 '
N / A N / A 1 6 3 . 1 5 6 ' �
N /A N/A 155 ' r1 { '
N/A i"/A arl :tl
N/A \/A t7q :iC
N/A \/A :6t r{l
N i \ \ / A : { ' ' t : l
50 2
5
10
20
m
N / A N /
1 6 0 ' 1 5 2 '
N / A N / A r { l ' 1 3 1 "
N / A N / A 1 1 6 . 1 2 9 .
N , A N / A r 2 i ' r 1 3 ,
\I/A N/A \R NR
\/A N/A \R \R
N " / A N / A 2 5 0 ' 2 1 3 '
N/A \ /A 223{ 2 r : .
N / A \ / A 2 1 2 . 2 t r .
N / A N / A 1 9 5 ' 1 3 i .
N /A \ /A l3 t { r i r .
N/A N/A NR NR
t2 28 $
137 198
AMENDMENT #1CAN/CGA-8149.I-M9L and CAN/CGA -8149.2_Mrgr.
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE b contd.Capacity of Tile-Lined Masonry Chimney with Single_Wall Vent Connectors
Serving a Single
ieighl
V€nt ConnNtor Diameter , D (inches)
To be ukd with .himney areas wjthin the size l imits ar bott
l 0 12
NAl NAT NATM , n I M a r l M a ^ l D n M , n l M a ^ l M a \ | D f M , n l M a \ l M a r l D p N l n l M a r l M a \ l D r
6 25
N/A N/A 247 14N/A N// 230 136
N/A N/A 319N/A N/A 297
188 N/A N/A M 2%
N/A N/A 375 221
N/A N,/A 580 s2N/A N/A 50 330
1 0 2510
N/A N/A 297 217
N/A N/A 276 201
N/A N/A 261 185
N/A N/A 387 283N/A N/A 3& 26N/A N/A 345 245
N/A N/A 4{ 358N/A N/A 465 339N/A N/A &1 313
N/A N/A 722 527N/A N/A 710 518N/A N/A 665 47'
25l0l 5
N/A N/A 335 288N/A N/A 312 2SN/A N/A 294 250N/A N/A 278 2S
N/A N/A 440 378N/A N/A 414 356N/A N/A 392 333N/A N/A 372 316
N/A N/A 50 482N/A N/A 531 457N/A N/A ru 4TN/A N/A 481 4@
N/A N/A 840 722N/A N/A 825 71tN/A N/A 774 68N/A N/A 738 627
20 25l01 520
N/A N/A 374 337N/A N/A 34 313N/A N/A 330 294N/A N/A 311 27N/A N/A 292 2d
N/A N/A 4m 41N/A N/A 461 415N/A N/A 437 389N/A N/A 414 368N/A N/A 392 349
N/A N/A 625 56N/A N/A 594 535N/A N/A 52 5mN/A tr{/A 536 477N/A N/A 510 46d
N/A N/A 950 855N/A N/A 930 837N/A N/A 875 79N/A N/A 835 743N/A N/A 8M 7]?
l0 25
1 01 520
N/A N/A 420 391N/A N/A 391 3gN/A N/A 370 ruN/A N/A 349 325N/A N/A 327 sN/A N/A 281* 251*
N/A N/A 556 517N/A N/A 524 47N/A N/A 496 461N/A N/A 471 €8N/A N/A g5 414N/A N/A 408 379
N/A N/A 715 65N/A N/A 680 632N/A N/A g 59N/A N/A 615 572N/A N/A S5 5&N/A N/A ru 56
N/A N/A 1110 1032N/A N/A rDo l0t4N/A N/A 1020 949N/A N/A 975 907N/A N/A 932 867N/A N/A 865 &4
50 25i 01 52030
N/A N/A 475 451N/A N/A 442 420N/A N/A 420. 399'N/A N/A 395" 375.N / A N / A 3 7 0 . 3 5 2 'N/A N/A 3r8* 302*
N/A N/A 631 599N/A N/A 593 563N/A N/A 552 534N/A N/A 533* 506rN/A N/A 504* 479*N/A N/A 458. 4i5 '
N/A N/A 8i0 770N/A N/A 770 732N/A N/A 7U 692N/A N/A 69s 6SN/A N/A 660* 627iN/A N/A 510* 580'
h-/A N/A 1240 1178N/A N/A 1220 11s9N/A.N/A 1140 1083N/A N/A 100 1036N/A N/A 1040 988N/A N/A 970 92?
lhimney
63 132
45 550 792
Tossibihty 01 continuo!s.ondenstjon.
24
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA-8149.2-M9L
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 7Capacity of Masonry Chimney with Type B Double-Wall Vent Connectors
Sening Two or More Category I Appliances
Vent Connector
H ( O
lndt Ratins Limits in Thousands of Btuh
N"Al \AT
M r n l M a r l v a r l D P M r n I M a ' I M a . l D P M ' n I M i . l M : r I D I M ' n I M a r l \ ! r r l D l
6 l
2
l
24 NR 21 73
% 4 3 2 a 7 7
27 49 34 21
39 62 40 ?4
4t 79 52 324) 9) 61 37
52
53
16 67 41
133 85 52155 97 59
65 r94 101 62
67 XO 121 ;6
69 262 143 E;
t 5 1
2
3
24 48 23 20
25 55 31 26
26 59 35 30
3 8 9 3 & 3 7
39 105 55 47
g
*57
9 7 4 6 3
74 a9 76
a9 102 a/'
n 2n 111 97
74 29 131 111
76 319 153 1{
30 1
2
3
2 4 v 2 5 2 3
2 3 6 3 2 3 0
2 6 & 3 6 3 3
37
38
11 48 45
2 5 8 v
52 192 82 76
9 2 0 8 9 5 S% 221 107 1ffi
59 357 i27 l ts
74 392 163 112
50 I
2 24 59 31 30
36
37
16 49 48
27 5A 56
51 26 82 80
53 25 96 93
55 A7 1ffi 105
67 45 133 t2q
7A 121 142 111
72 435 lio ]b:
Common Vent
r ( D
M , n i m x m l n r e m d l A ' " " o r C h , m n € v - A ( S d u d . € i n . h e ,
72
Combined ADDliance InDut &tins in Thouends ot Btuh
' * t ' ^ l - t ' * t * ' * l ' '
NR 74 45 25 15 NR 119 73 46 28 NR 178 1@ 71 43 \ R : :
{R 80 57 2a 20 NR 130 92 53 38 NR 193 137 82 J \ R 2 ; 9 l q : i t q q
t 0 N R & 6 3 1 2 4 NR 138 1S 56 e NR 207 161 S ;0 2S lrr
t5 {R 90 77 36 31 NR 152 129 67 57 NR 233 198 1ft S R S X l { 3
20 {R g , 83 4 t 17 NR 159 143 75 6 NR 2S 25 12 110 \ R N t t : : l : i a
30 N R N R N R N R N R N R N R N R N R N N NR 270 25r r37 127 \ R S l ; 6 : h i V
50 \ R N R N R N R N R N R N R N R N R N R N R N R N R N R N R \ R \ R \ F
AMENDMENT #1CAN/CGA-B149.1-M91 and CAN/CGA-8149.2-M9T
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 7 contd.Capacity of Masonry Chimney with T)?e B Double-Wall Vent Connectors
Serving Two or More Category I Appliances
Vent Comector
tieighl
H (ft)
Vent Conn{lor D,ameter D lin.h*l
t 0
Applianc€ lnplt ktine Limits in Thousands oI Btuh
R ( O
NAT NAT
M n I M a r l M a r l D P M i n l M a r l M , ^ l D P M i n l M a \ I M a \ | D P M i n l M a r l M a \ l D P
6 1
2
3
87 274 141
89 324 173 1ffi
97 369 28 124
tu 370 201 lX
107 4% 232 142
1E 497 270 165
124 479 %3 1U
127 W TO nl
145 599 319 195
144 694 378 231151 795 89 2A
1 5 I
2
tm 3& 174 1€lo3 419 192 163105 ffi 215 183
lX 511 2D t95r% 55a 2A 221t31 597 292 28
153 $8 297 %21S 718 339 288159 750 3a2 325
1& 824 375 319187 W 132 367ls m 46 4l l
30 1
2
96 5M 187 174
99 531 209 194t07 5il 83 217
t19 6U 255 237l2 7$ A7 267t25 7M 377 295
145 883 337 313149 928 378 352152 958 418 $9
175 1tl5 432 4U1D 1171 4U 4illa2 1?20 5i5 49i
50 i
2
92 582 t98 192
9 5 & D 2 7 5
% a4 247 2q
t15 798 271 2*
t18 427 3M 295121 8A 3& 324
l4 1&9 362 351143 1085 {0 S8t47 1lt8 439 426
1S 13y 462 44
172 1379 5rO 495
Common Vent
Minimum Intemal Area oI Gimnev A {Suare in nes,
a 6 113
FAN IFA^" I
DP I NArl Dl F A N I F A N I D P l N A r l D r
IFN I 'NAT I(F1N)I INAT IN+A
F^NlrAN-l DP+FN | +NATIG'N
DP FArv l FANI D l I NATI DP
,,*l.,^, 1,,,",1..", 1,,..NR 35r 214 r4r N7 M 5 3 5 2 0 N r M
M 6g 452 2m rq
M S 119 1t 113 M 53 4?0 7* 1e M t0 l0 7$ ta la
M 7 8 1 d S 3 1 0
M od dl 35 Dl NR 353 72 !1S 1t
\R g 5X 273 259 NR llz l2t :r9 6rj
s 620 s5 l?R 1r5 NR 92 NR 1692 1624 Srl i l
AMENDMENT #1CAN/CGA-8149.L-tr.{91 and CAN/CGA -Bt49.z-Mg1
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 8Capacity of Tile-Lined Masonry Chimney with Single-Wall Vent Connectors
Serving Two or More Cateeorv I A
H ( O
Vent Connector Diamere! - D (jnches)
5 6
App l iance lnput RahnA rn Thou$nd. n r E iuh
NAT NAT FAN NATFAN
Rtr i lv n l M i , l v , . l n r '
N R N R 2 1 1 4
NR NR 28 18
NR N\R A 22
NR NR 39 25
NR NR 52 34
NR NR 61 40
NR NR 66 43
NR NR 84 55
1U r53 97 63
179 191 1N 65
t86 227 123 80
193 25a 142 9)1 5 NR NR 23 20
NR NR 30 26
NR NR 34 29
NR NR 43 37
92 103 54 46
96 172 63 54
129 151 73 62
135 170 88 75
141 185 101 86
19 271 112 95
207 295 732 172
215 315 151 12830 NR NR 24 23
NR NR 31 29
h\R NR 35 33
86
95
108 47 45
119 57 54
127 65 62
126 187 80 76
132 203 93 88
138 216 105 100
193 U7 121 118
20I 366 712 135
209 381 160 I 52NR NR 25 24
NR NR 31 29
N R N R 3 5 3 3
89
94
13 48 46
23 57 54
37 65 62
124 204 80 76
130 218 94 89
136 231 106 101
188 392 130
196 408 149
204 122 167
42
\On tn B t4o . l Mot and Bt4o .2 Vot re ,e r lo ( t ru -e -
12 .8
ommon (C
H (ft)
Common Vent Eq!ivalent Chihnev Diameter - D (in.hcs)
5
Combined Appliance Input Rarine in Thousands of Btuh
"::l^.,1::l*T.1.::,:nl::l::l*^l ::l ::l .::l:l^ ' l * ' 1 "6 NR 73 44 25 15 NR 118 71 45 27 NR 17b lob 71 43 \ R 2 5 5 1 5 1 l f 2 f l
8 NR 79 58 28 20 NR 128 93 52 38 NR 190 139 81 59 NR 276 201 i l \ i6
1 0 NR 83 66 31 25 NR 136 109 56 rl5 NR 205 154 89 7l N R 2 9 5 : ; r t e r r j
t 5 NR 88 75 36 31 NR 149 127 66 55 NR 230 196 105 89 NR 315 lb i l i ( r r f
20 NR 90 80 40 36 NR 157 140 74 66 NR 247 220 120 107 NR 362 3X t ; i t I i l
l0 N R N R N R N R N R N R N R N R N R N R NR 266 247 135 126 NR 398 3;0 lei
50 N R N R N R N R N R N R N R N R N R N R N R N R N R N R N R N R N R \ R \ R \ R
NOTE: In 8149.1,M91 and 8149.2 M9t. refe. to Clause 7 l2 I
27
AMENDMENT #1CAN/CGA-B149.1-M91 and CAN/CGA-8r49,2-]Nt{{9l
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 8 contd.
Capacity of Tile-Lined Masonry Chimney with Single-Wall Vent ConnectorsServ Two or More Catesorv I A
H ( O R (fo
V€nt Conne.tor Diameter - D (
8 10
ApDliance InFut Ratins in Thousands of Btuh
NAT FAN NAT FAN NA] FAN
M r n l M a ^ | M a r I D P M i n l M a \ | M a \ | D P M i n I M a \ i M a \ | D P M r n l M a r l M a r l D r
6 231 271 110 91
239 321 172 172
247 365 2A2 131
29 366 200 130
301 432 231 150
309 491 269 175
362 474 252 164
373 557 299 194
381 63 g8 225
499 594 283 181
509 696 331 215
519 793 375 244
268 376 171 145
2n 411 789 767
286 439 213 181
349 502 225 191
359 548 256 218
445 e6 291 247
456 706 334 2U
466 755 378 321
623 808 360 306
634 884 4A2 342
646 945 437 37130 239 492 783 774
269 518 205 195
277 540 229 218
338 665 250 238
v8 699 282 268
358 729 312 296
$0 8e 330 314
442 908 372 353
452 946 412 391
600 1089 455 432
613 1145 490 466
626 7193 521 49550 252 567 194 184
262 588 218 207
271 607 243 231
328 n8 265 252
339 806 298 283
349 A31 32a 312
417 1U2 355 337
429 1058 393 373
440 1090 431 409
582 1302 537 510
596 1346 567 539
610 1386 595 565
NOTE: ln 8149.1 M91 and 8149.2-M91 .efer to Clau.e 7 12 I
Comnon
H (ftt
Common Vent Equivalent Chimnev Diamete. , D (inch€$
I l 0 12
Combind Appliance Input Rating Thousands of Btuh
: l : : l : : l : ] : : " ' l * . 1 * 1 . " 1 'N | -NAT I lFiN)l +\AT lrN.N t r a \ t - N A r t , F . N , t . N ^ r t , \ . ' r r r l . r . r | ' r - r , | - r . r | , r - r
NR 455 273 187 rr2 NR 579 347 ?45 r 17
M 497 53 217 rS NR 6i1 40 1n 7n7 NR 928 67 S5 296
M 512 {2b 2} 137 N R f f i 5 g M ' 4 isR lm U) 150 $0
M O2 512 2m 2t3 NR '? A% *N AB NR 1139 9S 540 4i9
NR 61 5S l2t ztr {R tu9 7* lri NR t2d r25 @ 570
NR 719 h37 lZ 3ir NR C57 nm r$ d( NR r47 r3S 740 S3
NR 821 7&r 4sh 4* NR 1076 rn?) ff NR 1672 15S 910 &i
NOr: In 8149.1'M9l and 8149.2 M91, refer to Clarse 7.12.8
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA-Bt4g.z-I.'{gl
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 9Current Recommended Single-Wall Vent Connector Total Length Lrmrts
VentConnector Z 4 5 6 7 gDiameter (inches)
Maximum Vent 5 6 8 10 11 72Connector Length (feet)
NOTE: Double-wall vent connectors may exceed these values up to a limitof twice these specified values.However, when these values are exceeded using a B-Vent, thecapacity must be reduced bv 10%.
AMENDMENT #1CAN/CGA-B149.1-M91 and CAN/CGA'81'49'2-M97
NATURAL GAS, AND PROPANE INSTALLATION CODES
TABLE 10
Masonry Chimney Liner Dimensions with Circular Equivalents
Nominal
Liner Size
Inch€s
4 t B
6 a 8
8 r , i 2
7 2 x 1 2
1 2 x 1 6
x 1 6
v , 2 A
2 A x 2 C
2 1 x 2 4
2 4 x 2 4
2 4 / , 2 8
2 8 x 2 8
3 0 x 3 0
3 0 x 3 5
: 6 r 3 6
6 - 3 / 4
6 - ) / 2
9 3 / 4 z
9 1 / 2 x
6 - r / 2
6 - 3 / 4
r a - r / 2
9 - 3 / 4
7 3 - 7 / 2
1 3 - r / 1
1 l
1 6 - : . , 1
2 A - i i 2
I n c h e s
561
' 1 . 1
I
9t 0
: a . 41 l
1 1 . 87 2i 1
1 1 . 5t 5
1 6 . 2L 8
2 D
2 A . ' r2 2
2 2 - r2 4
2 4 . 1
2 , 1
2 i . 9J ! '
: r i . 9
: :
Squa.e Inch€s
L 2 . 21 9 . 62 8 . 33 E . :
1 2 . . 1
5 ! . 3
6 3 - 6r 0 . 5
E : . 39 5
1 0 1 - 51 1 1 . 01 5 3 . 9
7 6 2 - 9' : t - 6 . 1
2 0 6 . 12 5 4 - 4
3 1 4 . 2t 8 0 . 1
3 8 0 . 1
4 5 6 - 2
t 1 2 . a
6 0 1? 0 6 . E
t 4 9 . 93 r 5 . 3
9 2 9 . ;
Inside Dim€nsions
of Lin€r in
In.h€s
2 - 7 / 2 x
Inside Diameter or
Equ iva len tD iameter Equ iva len tArea
t 6
I 6
' . 3 - 7 / 4
1 3
t 6 - 3 / 4
I 6 I / 2
2 A - r / 4
2 A - i / 4
2 4 - r / I
2 a r / 2
3 1 - i / :
r 8 . 2 2 6 4 . 2
2 5 . 4 5 4 3 . 3
\ \ ' hen L ine ! s izcs d i f fe r d imens( rn . r lh f rom tho t ' .hoNr : : T ib l t lL j . eq ! ' va len t d rane ic is nuv be
J e t c m i n e d f r o m p u b l i s h e d t a b l c r l o r s q u . l r e r n d ( ' . t i . i r : r . ' i ] . r . , ' t e . r ! , \ ? t r ' n t . a r n r n g . a P a c ' i ! o r b \
o i i . r eng ineer ing methods .
30
AMENDMENT #1CAN/CGA-8149.1-M91 and CANiCGA-8149.2-M9L
NATURAL GAS, AND PROPANE INSTALLATION CODES
Table 1 should be used when Type B vent is used torboth the venl connector and the vertical vent.
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA-8149.2-M97
NATURAL GAS. AND PROPANE INSTALLATION CODES
Table 2 should b€ used when a single-wall metal vent connector
ls attached to Type B vertical vent.
AMENDMENT #1CAN/CGA-B149.1-M91 and CAN/CGA-8749.2-M9T
NATURAL GAS, AND PROPANE INSTALLATION CODES
Table 3 should be used when Type B vent connectors
are attached to a Type B common venl
IIIIV
FIGURE 3
AMENDMENT #1CAN/CGA-8149.1-M91 and CAN/CGA -8149.2-M9t
NATURAL GAS, AND PROPANE INSTALLATION CODES
Table 4 should be used when single-wall metal venl connectorsare attached to a Type B common vent.
H
iL
FIGURE 4
, , / Dl t
t f lR t l l
l t l
Type B
// CommonVenl
,
D,
Appliance 1
R ,
IAppliance 2