Maximum UL555S Rated Pressure (in. wg.)
Maximum Dynamic Closure Velocity (fpm)
Maximum Vertical Size (in.)
MANUFACTURER
MODEL
Combination Fire/Smoke Dampers
128 × 96 or 144 × 48
POTTORFF
FSD-151
4,000
8
GREENHECK
FSD-311
4,000
8
128 × 100
RUSKIN
FSD60
4,000
8
120 × 96
POTTORFF
FSD-125R
3,000
4
24 Ø
GREENHECK
FSDR-511
3,000
4
24 Ø
RUSKIN
FSDR25
3,000
4
24 Ø
POTTORFF
FSD-172
2,000
4
24 × 24
GREENHECK
−
−
−
−
RUSKIN
FSD36-C
2,000
4
24 × 24
15
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