Large fire dampers

1501hvac06pA line of fire dampers for oversized openings includes Model DFD-210 that has a maximum size of 128 x 100 in. with a 1 1/2-hr. fire-resistance rating. Model DFD-230 has a maximum size of 72 x 48 in. with a 3-hr. resistance rating. Other sizes are available.
Greenheck, Schofield, WI
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