57In.H-W 6 1/4In.LAluminumBackdraftDamperDamper Application Backdraft Fo...57 In.H-W 6 1/4 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 2 Maximum Air Velocity 2500 fpm Overall Height 57 in Rough Opening Diameter 54 1/4 in Rough...more
21 In.H-W51/4In.LAluminumBackdraftDamperDamper Application Backdraft Fo...21 In.H-W 5 1/4 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 2500 fpm Overall Height 21 in Rough Opening Diameter 18 1/2 in Rough...more
23 In.H-W51/4In.LAluminumBackdraftDamperDamper Application Backdraft Fo...23 In.H-W 5 1/4 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 2500 fpm Overall Height 23 in Rough Opening Diameter 20 1/2 in Rough...more
13 In.H-W51/4In.LAluminumBackdraftDamperDamper Application Backdraft Fo...13 In.H-W 5 1/4 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 2500 fpm Overall Height 13 in Rough Opening Diameter 10 1/2 in Rough...more
15In.H-W51/4In.LAluminumBackdraftDamperDamper Application Backdraft Fo...15 In.H-W 5 1/4 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 2500 fpm Overall Height 15 in Rough Opening Diameter 12 1/2 in Rough...more
57In.H-W 6 1/4In.L Alum Wall Fan Shutter Damper Application Backdraft For No...57 In.H-W 6 1/4 In.L Alum Wall Fan Shutter Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Galvanized Steel Number of Panels 2 Maximum Air Velocity 2500 fpm Overall Height 57 in Rough Opening Diameter 54 1/2 in...more
33 In.H-W5.75In.LAluminumBackdraftDamperDamper Application Backdraft For...33 In.H-W 5.75 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 2500 fpm Overall Height 33 in Rough Opening Diameter 30 1/2 in Rough...more
27 In.H-W5.75In.LAluminumBackdraftDamperDamper Application Backdraft For...27 In.H-W 5.75 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 2500 fpm Overall Height 27 in Rough Opening Diameter 24 1/2 in Rough...more
51 In.H-W5.75In.LAluminumBackdraftDamperDamper Application Backdraft For...51 In.H-W 5.75 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 2 Maximum Air Velocity 2500 fpm Overall Height 51 in Rough Opening Diameter 48 1/2 in Rough...more
45In.H-W5.75In.LAluminumBackdraftDamperDamper Application Backdraft For...45 In.H-W 5.75 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 2 Maximum Air Velocity 2500 fpm Overall Height 45 in Rough Opening Diameter 42 1/2 in Rough...more
19 In.H-W5.75In.LAluminumBackdraftDamperDamper Application Backdraft For...19 In.H-W 5.75 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 2500 fpm Overall Height 19 in Rough Opening Diameter 16 1/2 in Rough...more
23 In.H-W5.75In.LAluminumBackdraftDamperDamper Application Backdraft For...23 In.H-W 5.75 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 2500 fpm Overall Height 23 in Rough Opening Diameter 20 1/2 in Rough...more
21 In.H-W5.75In.LAluminumBackdraftDamperDamper Application Backdraft For...21 In.H-W 5.75 In.L Aluminum Backdraft Damper Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 2500 fpm Overall Height 21 in Rough Opening Diameter 18 1/2 in Rough...more