12/06/2012 8
GI202
Duct Sizing Chart
Acceptable Branch Duct Sizes
Acceptable Main or Trunk Duct Sizes
CFM ROUND
Rectangular
Round
Rectangular
100 6”
4x8,
4x6
150
7”
4x10, 5x8, 6x6
200 8” 5x10,
6/8,4x14,7x7
250
9”
6x10, 8x8, 4x16
300
10”
6x14, 8x10, 7x12
350
10”
6x20, 6x16. 9x10
400
12”
6x18, 10x10, 9x12
10”
4x20, 7x10, 6x12, 8x9
450
12”
6x20, 8x14, 9x12, 10x11
10”
5x20, 6x16, 9x10, 8x12
500
10”
10x10,6x8, 8x12, 7x14
600
12”
6x10, 7x18, 8x16, 10x12
800
12”
8x18, 9x15, 10x14, 12x12
1000
14”
10x18, 12x14, 8x24
1200
16”
10x20, 12x18, 14x15
1400
16”
10x25, 12x20, 14x18, 15x16
1600
18”
10x30, 15x18, 14x20
1800
20”
10x35, 15,20, 16x19, 12x30, 14x25
2000
20”
10x40, 12x30, 15x25, 18x20
2200
22”
10x40, 15x25, 20x20
2400
22”
12x40, 16x25, 20x20
Table calculated for 0.05 to 0.10 inches of water friction per 100’ of duct. At these duct design conditions, along
with the pressure drop through the filter, the total design external static is 0.20 inches of water.
Содержание TVA series
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