21 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr Damper Application Backdraft For ...21 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 3250 fpm Overall Height 21 in Rough Opening Diameter 18 1/2 in Rough...more
19 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr Damper Application Backdraft For ...19 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 3250 fpm Overall Height 19 in Rough Opening Diameter 16 1/2 in Rough...more
27 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr Damper Application Backdraft For ...27 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 3250 fpm Overall Height 27 in Rough Opening Diameter 24 1/2 in Rough...more
39 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr Damper Application Backdraft For ...39 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 3250 fpm Overall Height 39 in Rough Opening Diameter 36 1/2 in Rough...more
15 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr Damper Application Backdraft For ...15 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 3250 fpm Overall Height 15 in Rough Opening Diameter 12 1/2 in Rough...more
33 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr Damper Application Backdraft For ...33 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 3250 fpm Overall Height 33 in Rough Opening Diameter 30 1/2 in Rough...more
43.6 In.H Alum Vertical Intake Shutter Frame Material Aluminum Number of Panel...43.6 In.H Alum Vertical Intake Shutter Frame Material Aluminum Number of Panels 2 Maximum Air Velocity 2000 fpm Overall Height 43 5/8 in Fits Fan Diameter 36 in Free Area 10.6 sq ft Overall Width 42 1/4 in Frame Depth 2 in Blade Material Aluminum...more