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Greenheck Fan Corporation certifies that the
model OFSD-212 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-
grams. The AMCA Certified Ratings Seal applies
to air performance ratings only.
AMCA 5.3 Pressure Drop OFSD-212
5D 6D
5D
D
=
4 (W) (H)
3.14
Figure 5.3
Figure 5.2
Figure 5.5
Velocity (fpm)
Pressure Drop
(in. wg)
Velocity (fpm)
Pressure Drop
(in. wg)
Velocity (fpm)
Pressure Drop
(in. wg)
Velocity (fpm)
Pressure Drop
(in. wg)
500 0.02 500 0.01 5000.01 5000.01
10000.09 10000.04 1000 0.03 1000 0.04
15000.20 1500 0.09 1500 0.06 1500 0.10
20000.36 20000.16 2000 0.11 2000 0.17
25000.56 2500 0.25 2500 0.17 2500 0.27
30000.81 30000.3530000.24 3000 0.39
3500 1.10 3500 0.48 3500 0.33 3500 0.53
40001.44 40000.63 4000 0.42 4000 0.70
12 in. x 12 in. (305mm x 305mm)
24 in. x 24 in. (610mm x 610mm)
36 in. x 36 in. (914mm x 914mm)
12 in. x 48 in. (305mm x 1219mm)
Velocity (fpm)
Pressure Drop
(in. wg)
500 0.02
1000 0.07
1500 0.16
2000 0.29
2500 0.45
3000 0.64
3500 0.88
4000 1.14
48 in. x 12 in. (1219mm x 305mm)
* This size is based on multi-section unit.