Page 117 - 2018_IFGC

CHIMNEYS AND VENTS

NAT Max Max 3,520 6,853 2,670 4,030 2,660 4,023 2,650 4,017 4,010 7,838 3,050 4,634 3,040 4,612 3,030 4,602 4,450 8,682 3,390 5,153 3,371 5,132 3,340 5,099 5,300 10,393 4,080 6,251 4,057 6,222 4,019 6,175 3,980 6,129 6,000 11,753 4,700 7,154 4,662 7,119 4,600 7,063 4,575 7,007 4,550 6,953

Connected directly to vent FAN Min 0 426 555 618 0 401 562 630 0 378 540 641 0 346 501 599 665 0 321 475 573 631 689
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Single Category I 22 NAT FAN Max Max 2,950 5,737 2,220 3,377 2,215 3,370 2,210 3,363 3,360 6,555 2,560 3,882 2,545 3,863 2,530 3,850 3,710 7,254 2,840 4,322 2,818 4,301 2,780 4,268 4,410 8,665 3,410 5,232 3,385 5,204 3,343 5,159 3,300 5,115 4,980 9,785 3,910 5,983 3,880 5,950 3,830 5,896 3,795 5,844 3,760 5,792

Number of Appliances Appliance Type Appliance Vent Connection NAT Min Max 0 2,430 360 1,850 469 1,835 523 1,820 0 2,750 336 2,110 476 2,090 537 2,070 0 3,050 319 2,340 458 2,318 546 2,280 0 3,620 290 2,800 426 2,777 510 2,739 564 2,700 0 4,060 269 3,200 403 3,174 489 3,130 541 3,090 585 3,050

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FAN
Min Max 4,721 0 2,782 296 2,774 390 2,767 437 5,387 0 3,196 278 3,180 398 3,163 450 5,955 0 3,556 264 3,536 382 3,504 459 7,099 0 4,304 239 4,278 355 4,234 432 4,192 479 7,988 0 4,916 220 4,885 337 4,835 413 4,786 459 4,737 495

NAT Max Max 1,960 3,802 1,480 2,250 1,475 2,242 1,470 2,235 2,220 4,333 1,700 2,584 1,685 2,563 1,670 2,552 2,450 4,782 1,890 2,868 1,871 2,849 1,840 2,818 2,900 5,678 2,260 3,467 2,235 3,442 2,193 3,402 2,150 3,363 3,250 6,376 2,570 3,955 2,544 3,926 2,500 3,880 2,465 3,835 2,430 3,791
VENT DIAMETER—(D) inches APPLIANCE INPUT RATING IN THOUSANDS OF BTU/H FAN NAT Min Max 0 1,530 225 1,170 300 1,160 341 1,150 0 1,740 212 1,340 311 1,330 354 1,320 0 1,925 202 1,480 300 1,461 364 1,430 0 2,270 186 1,770 283 1,748 346 1,712 385 1,675 0 2,520 175 2,000 270 1,978 334 1,940 372 1,910 404 1,880
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FAN Max 2,983 1,769 1,761 1,753 3,399 2,030 2,013 2,000 3,742 2,256 2,238 2,209 4,423 2,719 2,696 2,659 2,623 4,948 3,097 3,071 3,029 2,988 2,948 (continued)
Min 0 178 242 276 0 168 251 289 0 161 243 298 0 147 229 283 318 0 139 219 273 306 335

NAT FAN Max Max 1,170 2,267 890 1,346 880 1,338 870 1,330 1,320 2,571 1,020 1,543 1,010 1,528 1,000 1,514 1,450 2,825 1,130 1,713 1,105 1,696 1,080 1,669 1,720 3,323 1,350 2,062 1,327 2,041 1,289 2,009 1,250 1,976 1,900 3,701 1,520 2,343 1,498 2,320 1,460 2,282 1,425 2,245 1,390 2,210

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TABLE 504.2(1)—continued TYPE B DOUBLE-WALL GAS VENT 12 NAT FAN Min Max Max 0 850 1,645 138 650 982 191 640 975 219 630 967 0 970 1,858 130 745 1,124 199 733 1,110 231 720 1,097 0 1,060 2,036 124 850 1,244 192 829 1,229 238 795 1,204 0 1,240 2,380 114 985 1,495 182 967 1,476 227 936 1,446 257 905 1,418 0 1,350 2,637 107 1,100 1,694 174 1,079 1,674 220 1,045 1,641 248 1,018 1,609 273 990 1,578

NAT Min Max 0 570 103 455 147 445 171 435 0 660 98 515 154 503 180 490 0 720 93 560 149 547 187 525 0 840 86 675 140 660 177 635 202 610 0 930 81 755 135 738 172 710 195 688 217 665

10 Max 1,121 675 668 661 1,261 770 758 746 1,377 852 839 817 1,596 1,019 1,003 977 953 1,756 1,150 1,133 1,105 1,078 1,052
FAN
Min 0 75 110 128 0 71 115 137 0 68 112 142 0 63 105 135 155 0 59 101 130 150 167
LATERAL (L) (feet) 0 2 4 6 0 2 5 8 0 2 5 10 0 2 5 10 15 0 2 5 10 15 20

HEIGHT (H) (feet) 6 8 10 15 20

104 2018 INTERNATIONAL FUEL GAS CODE ®
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