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AmCA 5.5 Pressure drop
* This size is based on multi-section unit.
12 in. x 12 in. (305mm x 305mm)
Pressure Drop
Velocity (fpm)
(in. wg)
500
0.06
1000
0.22
1500
0.50
2000
0.89
2500
1.39
3000
2.00
3500
2.72
4000
3.55
24 in. x 24 in. (610mm x 610mm)
36 in. x 36 in. (914mm x 914mm)
Pressure Drop
Velocity (fpm)
Velocity (fpm)
(in. wg)
500
0.03
1000
0.14
1500
0.31
2000
0.54
2500
0.85
3000
1.22
3500
1.66
4000
2.17
Greenheck Fan Corporation certifies that the
model OFSD-211 shown herein is licensed to bear
the AMCA Seal. The ratings shown are based on
tests and procedures performed in accordance
with AMCA Publication 511 and comply with the
requirements of the AMCA Certified Ratings Pro-
R
grams. The AMCA Certified Ratings Seal applies to
air performance ratings only.
D
12 in. x 48 in. (305mm x 1219mm)
Pressure Drop
Velocity (fpm)
(in. wg)
500
0.03
500
1000
0.12
1000
1500
0.26
1500
2000
0.46
2000
2500
0.73
2500
3000
1.05
3000
3500
1.42
3500
4000
1.86
4000
4 (W) (H)
3.14
OFSd-211
48 in. x 12 in. (1219mm x 305mm)
Pressure Drop
Velocity (fpm)
(in. wg)
0.03
500
0.13
1000
1500
0.30
2000
0.53
2500
0.83
3000
1.19
3500
1.62
4000
2.11
Pressure Drop
(in. wg)
0.04
0.17
0.38
0.67
1.04
1.50
2.05
2.67
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