Installation Instructions

6
MASONRY CHIMNEY FLUE CAPACITIES - SINGLE FURNACE WITH TYPE B
DOUBLE WALL VENT CONNECTOR
Note: Masonry Chimney Flue Capacities table was extracted from Table 13.1(c)
of Chapter 13 of the National Fuel Gas Code, NFPA 54/ANSI Z223.1
28 in
2
38 in
2
50 in
2
63 in
2
78 in
2
95 in
2
2 86 130 180 247 320 401
5 82 117 165 231 298 376
2 93 145 198 266 350 446
5 88 134 183 247 328 423
8 83 127 175 239 318 410
2 103 162 221 298 388 491
5 96 148 204 277 365 466
10 87 139 191 263 347 444
2 114 179 250 336 441 562
5 107 164 231 313 416 533
10 97 153 216 296 394 567
15 89 141 201 281 375 485
2 124 201 274 375 491 627
5 116 184 254 350 463 597
10 107 172 237 332 440 566
15 97 159 220 314 418 541
20 83 148 206 296 397 513
2 137 216 303 421 558 717
5 128 198 281 393 526 683
10 115 184 263 373 500 648
15 107 171 243 353 476 621
20 91 159 227 332 450 592
30 N/A N/A 188 288 416 555
2 161 251 351 477 633 812
5 151 230 323 445 596 774
10 138 215 304 424 567 733
15 127 199 282 400 539 702
20 N/A 185 264 376 511 669
30 N/A N/A N/A 327 468 623
50
Minimum Internal Chimney Area
Lateral
, L, (ft)
Height,
H, (ft)
30
6
Appliance Input Rating in Thousands of Btu per Hour
8
10
15
20