Page 118 - 2018_IFGC

CHIMNEYS AND VENTS

NAT Max 7,060 5,600 5,552 5,471 5,391 5,310 5,225 8,430 6,860 6,818 6,749 6,710 6,670 6,603 10,300 8,800 8,756 8,683 8,610 8,537 8,391 8,100

24 FAN Max 13,848 8,617 8,574 8,505 8,437 8,370 8,239 16,694 10,788 10,737 10,652 10,570 10,488 10,328 20,578 14,264 14,204 14,105 14,007 13,910 13,720 13,354
Connected directly to vent NAT Min Max 0 5,850 285 4,650 439 4,622 535 4,574 590 4,527 639 4,480 739 4,375 0 6,940 251 5,695 394 5,654 491 5,585 542 5,546 586 5,506 672 5,444 0 8,600 204 7,200 341 7,162 436 7,100 487 7,037 523 6,975 592 6,850 752 6,600

Single Category I 22 FAN Max 11,483 7,194 7,155 7,090 7,026 6,964 6,842 13,767 8,980 8,933 8,855 8,779 8,704 8,557 16,817 11,803 11,748 11,658 11,569 11,482 11,310 10,979

Number of Appliances Appliance Type Appliance Vent Connection 20 NAT Min Max Max 0 4,750 9,341 241 3,810 5,900 373 3,783 5,863 456 3,739 5,803 507 3,695 5,744 548 3,650 5,686 635 3,565 5,574 0 5,635 11,129 209 4,630 7,339 336 4,597 7,295 419 4,542 7,224 465 4,511 7,155 506 4,479 7,086 577 4,421 6,953 0 6,700 13,454 169 5,800 9,577 293 5,769 9,528 374 5,717 9,447 418 5,665 9,367 452 5,613 9,289 514 5,509

NAT FAN Min Max 0 3,770 199 3,050 312 3,020 386 2,970 431 2,920 467 2,870 540 2,785 0 4,460 171 3,670 283 3,639 355 3,585 396 3,534 433 3,481 494 3,431 0 5,300 138 4,600 245 4,566 318 4,509 358 4,451 387 4,394 446 4,279 572 4,050
VENT DIAMETER—(D) inches APPLIANCE INPUT RATING IN THOUSANDS OF BTU/H FAN NAT Max Min Max 7,420 0 2,920 4,734 159 2,380 4,701 252 2,350 4,647 316 2,300 4,594 354 2,250 4,542 384 2,200 4,442 440 2,130 8,774 0 3,440 5,864 141 2,840 5,826 234 2,813 5,763 295 2,767 5,701 330 2,721 5,641 361 2,675 5,523 412 2,631 10,485 0 4,050 7,591 120 3,500 7,548 208 3,475 7,478 268 3,434 7,409 304 3,392 7,341 330 3,35
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FAN Max 5,725 3,696 3,666 3,617 3,570 3,523 3,433 6,711 4,554 4,520 4,464 4,409 4,356 4,253 7,914 5,834 5,797 5,737 5,678 5,619 5,505 5,289
Min 0 127 206 259 292 319 369 0 113 191 243 274 300 347 0 95 172 223 252 277 319 415

NAT Max Max 2,170 4,252 1,800 2,786 1,775 2,759 1,733 2,716 1,692 2,674 1,650 2,633 1,585 2,555 2,550 4,934 2,125 3,409 2,102 3,380 2,064 3,332 2,026 3,285 1,987 3,239 1,910 3,150 2,950 5,729 2,550 4,313 2,531 4,282 2,500 4,231 2,469 4,182 2,438 4,133 2,375 4,037 2,250 3,856

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TABLE 504.2(1)—continued TYPE B DOUBLE-WALL GAS VENT 12 FAN NAT FAN Min Max Max 0 1,550 3,004 98 1,310 2,004 164 1,289 1,981 209 1,254 1,944 237 1,220 1,908 260 1,185 1,873 305 1,130 1,807 0 1,825 3,441 86 1,513 2,431 151 1,495 2,406 196 1,466 2,366 222 1,437 2,327 244 1,408 2,288 287 1,349 2,214 0 2,050 3,925 72 1,820 3,027 136 1,803 3,002 180 1,775 2,961 206 1,747 2,920 226 1,719 2,880 265 1,663 2,803

NAT Min Max 0 1,060 74 865 127 851 164 829 187 807 207 784 246 745 0 1,195 66 1,010 118 996 154 972 177 948 195 924 232 876 0 1,310 44 1,170 107 1,159 142 1,142 163 1,124 181 1,107 215 1,071 292 1,000 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 British thermal unit per hour = 0.2931 W.

10 Max 1,977 1,351 1,332 1,301 1,272 1,243 1,189 2,231 1,620 1,600 1,567 1,536 1,505 1,446 2,491 1,975 1,955 1,923 1,892 1,861 1,802 1,688
FAN
Min 0 54 96 125 143 160 195 0 41 90 118 136 151 183 0 30 82 108 126 141 170 241
LATERAL (L) (feet) 0 2 5 10 15 20 30 0 2 5 10 15 20 30 0 2 5 10 15 20 30 50

HEIGHT (H) (feet) 30 50 100 For SI:

2018 INTERNATIONAL FUEL GAS CODE ® 105
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