Item Description

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 Opening Shape Square Fits Fan Diameter 18 in For Duct Shape Not Applicable Free Area 2 sq ft Overall Width 21 in Frame Material Thickness 0.8 in Overall Length 5 3/4 in Connection Type Not Applicable Frame Depth 2 1/2 in

Manufacturer Name: DAYTON

Manufacturer Part Number: 4C558

Brand Name: DAYTON

Country of Origin: United States (US)

National Stock Number: n/a

Unit of Measure: EA

Item Weight: 5.400 pounds

UNSPSC: 40101504 | UPC: n/a

Manufacturer's limited warranty.