Maximum Dynamic Closure Velocity (fpm)
Maximum UL555S Rated Pressure (in.wg.)
Maximum Vertical Size (in.)
MANUFACTURER
MODEL
Combination Fire/Smoke Dampers
POTTORFF
FSD-142
2,000
4
144 × 96
GREENHECK
FSD-212
2,000
6/4
128 × 100
RUSKIN
FSD36
2,000
4
126×96 or 72×122
POTTORFF
FSD-142-SP
2,000
4
44× 48
GREENHECK
−
−
−
−
RUSKIN
FSD36FA
2,000
4
36× 36
POTTORFF
FSD-142-OP
2,000
4
36× 48
GREENHECK
OFSD-212
2,000
6
36× 36
RUSKIN
FSD36GA
2,000
4
36× 36
13
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