Page 115 - 2018_IFGC
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CHIMNEYS AND VENTS
NAT Max Max 470 897 370 543 362 536 354 530 537 1,006 418 619 407 607 396 596 585 1,096 457 684 446 671 427 651 682 1,263 544 815 529 800 507 777 491 755 752 1,384 612 917 599 902 576 877 557 853 537 830
Connected directly to vent 9 FAN Min 0 63 93 110 0 60 99 117 0 57 95 122 0 53 90 116 134 0 50 86 112 129 145
Single Category I NAT Max Max 370 698 285 425 279 419 273 413 415 780 322 483 313 473 303 463 450 847 355 533 346 522 330 504 525 970 414 633 403 620 386 600 373 580 575 1,057 470 711 460 697 443 675 427 654 410 634
Number of Appliances Appliance Type Appliance Vent Connection 8 FAN NAT Min Max 0 285 53 217 79 211 93 205 0 320 50 247 83 237 99 227 0 345 48 273 81 263 104 245 0 390 45 316 76 300 99 288 115 275 0 430 41 346 73 337 95 321 111 308 125 295
FAN Max Min 524 0 321 44 316 66 310 78 583 0 365 42 356 70 347 84 631 0 402 40 392 68 376 88 716 0 475 38 463 64 445 84 429 98 776 0 531 33 519 62 499 81 481 94 464 107
VENT DIAMETER—(D) inches APPLIANCE INPUT RATING IN THOUSANDS OF BTU/H NAT FAN Max Max 205 375 157 232 153 227 149 223 235 415 180 263 173 255 165 247 255 447 195 289 188 280 175 267 285 502 225 339 217 330 208 315 198 301 307 540 249 377 241 367 228 351 217 337 206 322
7
NAT Min Max 0 141 32 105 50 103 59 100 0 155 28 120 53 115 64 109 0 166 26 129 52 124 67 115 0 187 22 150 49 142 64 135 76 128 0 202 20 166 47 160 62 150 73 142 84 134 (continued)
Max 251 157 153 149 276 178 171 164 295 194 187 176 327 226 219 206 195 349 250 242 229 217 206
6
FAN
Min NAT Max 0 86 27 67 39 64 47 61 0 94 25 75 42 71 51 66 0 100 23 81 41 77 54 70 0 112 20 93 39 87 51 82 61 76 0 119 18 100 38 96 50 89 59 84 69 78
TYPE B DOUBLE-WALL GAS VENT FAN Max Min 152 0 97 18 94 30 91 36 165 0 109 16 103 32 98 39 175 0 118 17 113 32 104 41 191 0 136 15 130 30 121 40 112 48 202 0 149 14 143 29 133 38 124 46 116 55
5
TABLE 504.2(1) 4 NAT FAN Max Max 46 78 36 51 34 49 32 46 50 84 40 57 38 53 35 49 53 88 42 61 40 57 36 51 58 94 48 69 45 65 41 59 37 53 61 97 51 75 48 71 44 64 40 58 35 52
LATERAL (L) Min (feet) 0 0 13 2 21 4 25 6 0 0 12 2 23 5 28 8 0 0 12 2 23 5 30 10 0 0 11 2 22 5 29 10 35 15 0 0 10 2 21 5 28 10 34 15 48 20
3
HEIGHT (H) (feet) 6 8 10 15 20
102 2018 INTERNATIONAL FUEL GAS CODE ®
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