Bryant ZONE PERFECT PLUS - Page 21

TABLE 1–ZONE CFM
MAIN & BRANCH DUCT AREA (SQ. IN.)
Equipment Capacity
2 2.5 3 3.5 4 5 6 7.5 8 8.5 10 12.5
200
Main 57** 57 57 64 64 64
Branch 66*** 66 66 75 75 75
300
Main 79 79 79 79 79 87 87
Branch 99 99 99 99 99 110 110
400
Main 86 86 86 86 86 86 104 104 104
Branch 132 132 132 132 132 132 140 140 140
500
Main 113 113 113 113 113 113 113 123 123 123 123
Branch 165 165 165 165 165 165 165 179 179 179 179
600
Main 123 123 123 123 123 123 123 123 133 133 133 133
Branch 198 198 198 198 198 198 198 198 208 208 208 208
700
Main 143 143 143 143 143 143 143 143 154 154 154
Branch 231 231 231 231 231 231 231 231 246 246 246
800
Main 154 154 154 154 154 154 154 154 154 154 165
Branch 264 264 264 264 264 264 264 264 264 264 273
900
Main 165 165 165 165 165 165 165 165 165 177
Branch 297 297 297 297 297 297 297 297 297 311
1000
Main 189 189 189 189 189 189 189 189 189 201
Branch 330 330 330 330 330 330 330 330 330 330
1100
Main 201 201 201 201 201 201 201 201 201
Branch 363 363 363 363 363 363 363 363 363
1200
Main 214 214 214 214 214 214 214 214 214
Branch 396 396 396 396 396 396 396 396 396
1300
Main 227 227 227 227 227 227 227 227
Branch 429 429 429 429 429 429 429 429
1400
Main 241 241 241 241 241 241 241 241
Branch 462 462 462 462 462 462 462 462
1500
Main 254 254 254 254 254 254 254
Branch 495 495 495 495 495 495 495
1600
Main 269 269 269 269 269 269 269
Branch 528 528 528 528 528 528 528
1700
Main 284 284 284 284 284 284
Branch 561 561 561 561 561 561
1800
Main 299 299 299 299 299 299
Branch 594 594 594 594 594 594
1900
Main 314 314 314 314 314
Branch 627 627 627 627 627
2000
Main 314 314 314 314 314
Branch 660 660 660 660 660
2100
Main 330 330 330 330
Branch 693 693 693 693
2200
Main 346 346 346 346
Branch 726 726 726 726
2300
Main 363 363
Branch 759 759
2400
Main 363 363
Branch 792 792
2500
Main 380 380
Branch 825 825
Shaded areas represent less than 20 percent of total CFM, increased by one size.
*Main Duct sq in. are determined by multiplying CFM by 1.3 (200x1.3=260). Then size duct based on square inches of round pipe. Example: 260CFM.1 in. wc = 8.5” round
pipe=57sqin.
**Branch duct sq in. are based on 6” pipe delivering 100 CFM .1 in. wc X 1.3 = 130 CFM. Take 130 CFM .1 in. wc =6.5”pipe = 33 sq in. Example: 33 sq in. /100 CFM X
2=66CFM
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