Damper Depth8"
DescriptionHeavy Duty Fire Damper Rated For (4) Four Hours to BD 476, Part 20 and NFPA 130 (250 C/1 HR)
Max Face Velocity5000 FPM
Max Pressure30 in. wg
Max Temperature482 F

Damper Depth9-1/2"
DescriptionExtruded Aluminum Airfoil Tunnel Damper, 250 C/1 HR, Thermal Shock Construction, 6,000,000 Transient Pressure Reversals
Max Face Velocity4000 FPM
Max Pressure21 in. wg
Max Temperature482 F