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Backdraft Damper, Horizontal, 39-3/4Sq

  • Mfr # 3HHN2

  • Zoro # G2920915

product price:  $181.99
/ea
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Key Features

Type
No Flange, Horizontal Mount
Damper Size (In.)
39-3/4 x 39-3/4
Overall Size (In.)
39-3/4 x 39-3/4
Includes
Pre-Punched Conduit Hole Knock-Out; Felted Edges for Quiet Operation
Max. Velocity (FPM)
2,000 fpm
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Specifications

Product Information

MFR #
3HHN2
Zoro #
G2920915
UPC #
190735289587
Country of Origin
United States

Dimensions

Damper Size (In.)
39-3/4 x 39-3/4
Overall Size (In.)
39-3/4 x 39-3/4
Overall Width
39 3/4 in
Overall Length
4 1/2 in
Overall Height
39 3/4 in
Frame Depth
2 in
Blade Material Thickness
26 ga
Rough Opening Diameter
40 in
Rough Opening Length
40 in
Frame Material Thickness
20 ga
Rough Opening Width
40 in
For Nominal Duct Diameter
40 in
Fits Fan Diameter
40 in
Wire Rope Length
4 1/2 in

Details

Item
39.75"H-W 4.5"L Aluminum Backdraft Dampr
Type
No Flange, Horizontal Mount
Includes
Pre-Punched Conduit Hole Knock-Out; Felted Edges for Quiet Operation
Max. Velocity (FPM)
2,000 fpm
Construction Material
G-90 Galvanized Steel Frame and Aluminum Blades
Outside Flange (In.)
39-3/4 x 39-3/4
Rough Opening Shape
Square
Opening Type
Spring
Blade Material
Aluminum
For Duct Shape
Square
Series
611
Maximum Air Velocity
2250 fpm
Blade Orientation
Parallel Blades
Bushing Material
Nylon
Single Acting/Double Acting
Single Acting
Frame Material
Galvanized Steel
Flange Type
None
Number of Panels
1
Minimum Ambient Temperature
-40 Degrees F
Switch Action
Normally Closed
Damper Application
Backdraft
Damper Finish
Mill Finish
Airflow Direction
Horizontal; Vertical
Damper Type
Dynamic
Maximum Ambient Temperature
180 Degrees F
Free Area
10.2 sq ft
Mounting Position
Horizontal; Vertical
Closure Type
Spring
Blade Seal Material
Felt
Counterbalanced
Yes
Closure Velocity Rating
2,000 fpm
Maximum Pressure
1 in wc
Frame Less Flange
39 3/4
Blade Type
Flat Blade
Includes Motor
No

Description

39.75 In.H-W 4.5 In.L Aluminum Backdraft Dampr, Damper Application Backdraft, For Nominal Duct Diameter 40 in, Frame Material Galvanized Steel, Number of Panels 1, Maximum Air Velocity 2250 fpm, Overall Height 39 3/4 in, Rough Opening Diameter 40 in, Rough Opening Shape Square, Fits Fan Diameter 40 in, For Duct Shape Square, Free Area 10.2 sq ft, Overall Width 39 3/4 in, Frame Material Thickness 20 ga, Overall Length 4 1/2 in, Frame Depth 2 in, Rough Opening Length 40 in

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