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Dayton Damper, Backdraft 4HX74 - main

Damper, Backdraft

  • Mfr # 4HX74

  • Zoro # G2378257

product price: $58.79
/ea

Key Features

Type
Wall Mount, Supply
Damper Size (In.)
12 x 12
Overall Size (In.)
14-3/4 x 14-3/4
Includes
Felted Edges for Quiet Operation
Outside Flange (In.)
14-3/4 x 14-3/4
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Specifications

Product Information

MFR #
4HX74
Zoro #
G2378257
UPC #
190735325988
Country of Origin
United States

Dimensions

Damper Size (In.)
12 x 12
Overall Size (In.)
14-3/4 x 14-3/4
Flange Width (In.)
1 3/8 in
Blade Material Thickness
26 ga
Rough Opening Length
11 1/2 in
Overall Length
4 1/2 in
Flange Width
1 1/2 in
Rough Opening Width
12.5 in
Fits Fan Diameter
12 in
Frame Material Thickness
0.1 in
Frame Depth
1 5/8 in
Rough Opening Diameter
12 1/2 in
Overall Width
14 3/4 in
Overall Height
14 3/4 in

Details

Item
14.75"H-W 4.5"L Aluminum Backdraft Dampr
Type
Wall Mount, Supply
Includes
Felted Edges for Quiet Operation
Outside Flange (In.)
14-3/4 x 14-3/4
Max. Velocity (FPM)
2,000 fpm
Use w/Dayton Ventilators
4HZ46, 4HZ47
Construction Material
16-gauge Extruded Aluminum Frame, Aluminum Blades, Galvanized Steel Tie Rods and Stainless Steel Hardware
Switch Action
Normally Closed
Flange Type
Front Flange
Minimum Ambient Temperature
-40 Degrees F
Blade Type
Flat Blade
Closure Velocity Rating
2,250 fpm
Damper Type
Static
Damper Application
Backdraft
Counterbalanced
Yes
Maximum Ambient Temperature
180 Degrees F
Blade Material
Aluminum
Blade Seal Material
Felt
Mounting Position
Vertical
Series
CWV
Number of Panels
1
Opening Type
Spring
Closure Type
Gravity
Rough Opening Shape
Square
Airflow Direction
Horizontal; Vertical
Maximum Pressure
1 in wc
Single Acting/Double Acting
Single Acting
Tie-Rod Material
Galvanized Steel Frame and Tie Rods
Free Area
0.7 sq ft
Maximum Air Velocity
2250 fpm
Frame Material
Aluminum
Blade Orientation
Parallel Blades
For Duct Shape
Square
Damper Finish
Mill Finish
Frame Less Flange
12
Bushing Material
Stainless Steel

Description

14.75 In.H-W 4.5 In.L Aluminum Backdraft Dampr, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Aluminum, Number of Panels 1, Maximum Air Velocity 2250 fpm, Overall Height 14 3/4 in, Rough Opening Diameter 12 1/2 in, Rough Opening Shape Square, Fits Fan Diameter 12 in, For Duct Shape Square, Free Area 0.7 sq ft, Overall Width 14 3/4 in, Frame Material Thickness 0.1 in, Overall Length 4 1/2 in, Connection Type Not Applicable, Frame Depth 1 5/8 in

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