Bryant ZONE PERFECT PLUS - Page 18

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Zone 4
Main Duct Square Inches__143____ = Main Duct Size __8x20_____
Table 2A Main Duct Sizing
Equivalent Areas for Ducts (sq.in.)
Duct Height (in.) Round
Duct Width 8 10 Dia-Inch Sq.In.
86080 850
10 80 87 10 79
12 90 110 12 113
14 105 135 14 154
16 115 157 16 201
18 125 167
20 145 190
22 155 210
24 165 215
Branch Square Inches_____231__
Size__6"___Qty___2___ Area (from Table 2B)=___56___+
Size__8"___Qty___3___ Area (from Table 2B)=__180___+
=__236___Total Sq.In.
Table 2B Branch Duct Area (Sq.In)
Duct Diameter - in.
Quantity 5 6 7 8 10
1 20283860 79
2 40 56 76 135 180
3 60 84 114 180 330
4 80 112 152 235 465
5 100 140 190 300 530
6 120 168 228 365 660
7 140 196 266 430 760
8 160 224 304 500 825
Fig. 9–Residential Duct Work Layout
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Zn 1
8x12
Zn 4
8x20
Zn 3
8x12
Zn 2
8x16
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