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Backdraft Damper, Vert/Horiz Mtg, 27 3/4Sq

  • Mfr # 3HHL7

  • Zoro # G2135865

product price:  $107.99
/ea
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Key Features

Type
No Flange, Horizontal or Vertical Mount
Damper Size (In.)
27-3/4 x 27-3/4
Overall Size (In.)
27-3/4 x 27-3/4
Construction Material
G-90 Galvanized Steel Frame and Aluminum Blades
Outside Flange (In.)
27-3/4 x 27-3/4
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Specifications

Product Information

MFR #
3HHL7
Zoro #
G2135865
UPC #
190735289549
Country of Origin
United States

Dimensions

Damper Size (In.)
27-3/4 x 27-3/4
Overall Size (In.)
27-3/4 x 27-3/4
Overall Width
27 3/4 in
Overall Length
4 1/2 in
Overall Height
27 3/4 in
Rough Opening Diameter
28 in
Frame Depth
2 in
Fits Fan Diameter
28 in
For Nominal Duct Diameter
28 in
Rough Opening Length
28 in
Rough Opening Width
28 in
Blade Material Thickness
26 ga
Frame Material Thickness
20 ga
Wire Rope Length
4 1/2 in

Details

Item
27.8"H-W 4.5"L Alu Spring Bkdrft Dampr
Type
No Flange, Horizontal or Vertical Mount
Construction Material
G-90 Galvanized Steel Frame and Aluminum Blades
Outside Flange (In.)
27-3/4 x 27-3/4
Includes
Pre-Punched Conduit Hole Knock-Out; Felted Edges for Quiet Operation
Max. Velocity (FPM)
2,000 fpm
For Duct Shape
Square
Damper Application
Backdraft
Maximum Air Velocity
2000 fpm
Free Area
4.9 sq ft
Minimum Ambient Temperature
-40 Degrees F
Blade Seal Material
Felt
Rough Opening Shape
Square
Mounting Position
Horizontal; Vertical
Damper Finish
Mill Finish
Series
411
Counterbalanced
No
Blade Material
Aluminum
Single Acting/Double Acting
Single Acting
Airflow Direction
Horizontal; Vertical
Bushing Material
Nylon
Damper Type
Dynamic
Closure Type
Spring
Frame Material
Galvanized Steel
Frame Less Flange
27 3/4
Blade Type
Flat Blade
Switch Action
Normally Closed
Flange Type
None
Maximum Ambient Temperature
180 Degrees F
Opening Type
Spring
Blade Orientation
Parallel Blades
Closure Velocity Rating
2,000 fpm
Number of Panels
1
Maximum Pressure
1 in wc
Includes Motor
No

Description

27.8 In.H-W 4.5 In.L Alu Spring Bkdrft Dampr, Damper Application Backdraft, For Nominal Duct Diameter 28 in, Frame Material Galvanized Steel, Number of Panels 1, Maximum Air Velocity 2000 fpm, Overall Height 27 3/4 in, Rough Opening Diameter 28 in, Rough Opening Shape Square, Fits Fan Diameter 28 in, For Duct Shape Square, Free Area 4.9 sq ft, Overall Width 27 3/4 in, Frame Material Thickness 20 ga, Overall Length 4 1/2 in, Frame Depth 2 in, Rough Opening Length 28 in, Maximum Pressure 1 in wc

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