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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

Details

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