18 in 21"H-W 5 1/4"L Aluminum Backdraft Damper, 18-1/2 in x 18-1/2 in, Aluminum
Mfr # 3HHN7
Zoro # G1174433
product price:Â $90.49
/ea
Free Shipping & Returns
Key Features
Shutter Mounting Position
Vertical
Shutter Mounting Location
Wall
Shutter Construction Material
Extruded Aluminum Frame and Galvanized Tie Rods
Shutter Free Area
2.043 sq ft
Shutter Opening Required
18-1/2 in x 18-1/2 in
Get a 10% off coupon
Free 30-day returns
Return PolicyGet 30 days to pay with Net 30
Apply NowUnlock tax-exempt savings
Add Tax ExemptionSpecifications
Product Information
MFR #
3HHN7
Zoro #
G1174433
UPC #
190735289631
Country of Origin
United States
Dimensions
Shutter Overall Size
21 in x 21 in
Fits Fan Dia.
18 in
Frame Depth
3 in
Open Depth
5 3/4 in
Mounting Hole Size
Prepunched
Flange Width
1 1/2 in
Frame Opening Width
18 in
Frame Opening Height
18 in
Overall Length
5 1/4 in
Overall Height
21 in
Frame Material Thickness
0.8 in
Overall Width
21 in
Rough Opening Width
18.5 in
Blade Material Thickness
26 ga
Mounting Hole Diameter
1/4 in
Rough Opening Length
18 1/2 in
Overall Diameter
21 in
Fits Fan Diameter
18 in
Rough Opening Diameter
18 1/2 in
Description
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 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 1/4 in, Connection Type Not Applicable, Frame Depth 3 in
Ratings & reviews
3 reasons you can count on us
Supplies for every job.
10 million items and the exact one you need.
When you need it fast, count on Zoro!
2 million products ship in 1 day.
Stretch your budget further.
Everyday low prices on the brands you love.