Page 125 - 2018_IFGC

CHIMNEYS AND VENTS

TABLE 504.2(5) Number of Appliances Single
SINGLE-WALL METAL PIPE OR TYPE B ASBESTOS CEMENT VENT Appliance Type Draft hood equipped
Appliance Vent Connection Connected directly to pipe or vent
VENT DIAMETER—(D) inches
3 4 5 6 7 8 1 0 1 2
HEIGHT (H) LATERAL (L)
(feet) (feet) MAXIMUM APPLIANCE INPUT RATING IN THOUSANDS OF BTU/H
0 39 70 116 170 232 312 500 750
6 2 31 55 94 141 194 260 415 620
5 28 51 88 128 177 242 390 600
0 42 76 126 185 252 340 542 815
2 32 61 102 154 210 284 451 680
8
5 29 56 95 141 194 264 430 648
10 24 49 86 131 180 250 406 625
0 45 84 138 202 279 372 606 912
2 35 67 111 168 233 311 505 760
10 5 32 61 104 153 215 289 480 724
10 27 54 94 143 200 274 455 700
15 NA 46 84 130 186 258 432 666
0 49 91 151 223 312 420 684 1,040
2 39 72 122 186 260 350 570 865
5 35 67 110 170 240 325 540 825
15
10 30 58 103 158 223 308 514 795
15 NA 50 93 144 207 291 488 760
20 NA NA 82 132 195 273 466 726
0 53 101 163 252 342 470 770 1,190
2 42 80 136 210 286 392 641 990
5 38 74 123 192 264 364 610 945
20
10 32 65 115 178 246 345 571 910
15 NA 55 104 163 228 326 550 870
20 NA NA 91 149 214 306 525 832
0 56 108 183 276 384 529 878 1,370
2 44 84 148 230 320 441 730 1,140
5 NA 78 137 210 296 410 694 1,080
30 10 NA 68 125 196 274 388 656 1,050
15 NA NA 113 177 258 366 625 1,000
20 NA NA 99 163 240 344 596 960
30 NA NA NA NA 192 295 540 890
0 NA 120 210 310 443 590 980 1,550
2 NA 95 171 260 370 492 820 1,290
5 NA NA 159 234 342 474 780 1,230
50 10 NA NA 146 221 318 456 730 1,190
15 NA NA NA 200 292 407 705 1,130
20 NA NA NA 185 276 384 670 1,080
30 NA NA NA NA 222 330 605 1,010
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 British thermal unit per hour = 0.2931 W.

112 2018 INTERNATIONAL FUEL GAS CODE ®
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