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  11. Backdraft Damper, Vert/Horiz Mtg, 29 3/4Sq
Dayton Backdraft Damper, Vert/Horiz Mtg, 29 3/4Sq 3HHL8 - main

Backdraft Damper, Vert/Horiz Mtg, 29 3/4Sq

  • Mfr # 3HHL8

  • Zoro # G0543803

product price: $115.99
/ea
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Key Features

Type
No Flange, Horizontal or Vertical Mount
Damper Size (In.)
29-3/4 x 29-3/4
Overall Size (In.)
29-3/4 x 29-3/4
Max. Velocity (FPM)
2,000 fpm
Outside Flange (In.)
29-3/4 x 29-3/4
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Specifications

Product Information

MFR #
3HHL8
Zoro #
G0543803
UPC #
190735289556
Country of Origin
United States

Dimensions

Damper Size (In.)
29-3/4 x 29-3/4
Overall Size (In.)
29-3/4 x 29-3/4
Overall Width
29 3/4 in
Overall Height
29 3/4 in
Overall Length
4 1/2 in
Fits Fan Diameter
30 in
For Nominal Duct Diameter
30 in
Rough Opening Width
30 in
Frame Material Thickness
20 ga
Blade Material Thickness
26 ga
Rough Opening Length
30 in
Frame Depth
2 in
Rough Opening Diameter
30 in

Details

Item
29.75"H-W 4.5"L Aluminum Backdraft Dampr
Type
No Flange, Horizontal or Vertical Mount
Max. Velocity (FPM)
2,000 fpm
Outside Flange (In.)
29-3/4 x 29-3/4
Includes
Pre-Punched Conduit Hole Knock-Out; Felted Edges for Quiet Operation
Construction Material
G-90 Galvanized Steel Frame and Aluminum Blades
Frame Less Flange
29 3/4
Minimum Ambient Temperature
-40 Degrees F
Rough Opening Shape
Square
Counterbalanced
No
Blade Material
Aluminum
Bushing Material
Nylon
For Duct Shape
Square
Closure Velocity Rating
2,000 fpm
Switch Action
Normally Closed
Flange Type
None
Damper Type
Dynamic
Series
411
Blade Seal Material
Felt
Single Acting/Double Acting
Single Acting
Blade Type
Flat Blade
Damper Application
Backdraft
Frame Material
Galvanized Steel
Opening Type
Spring
Airflow Direction
Horizontal; Vertical
Closure Type
Spring
Maximum Pressure
1 in wc
Damper Finish
Mill Finish
Mounting Position
Horizontal; Vertical
Maximum Ambient Temperature
180 Degrees F
Maximum Air Velocity
2000 fpm
Blade Orientation
Parallel Blades
Free Area
6 sq ft
Number of Panels
1
Includes Motor
No

Description

29.75 In.H-W 4.5 In.L Aluminum Backdraft Dampr, Damper Application Backdraft, For Nominal Duct Diameter 30 in, Frame Material Galvanized Steel, Number of Panels 1, Maximum Air Velocity 2000 fpm, Overall Height 29 3/4 in, Rough Opening Diameter 30 in, Rough Opening Shape Square, Fits Fan Diameter 30 in, For Duct Shape Square, Free Area 6 sq ft, Overall Width 29 3/4 in, Frame Material Thickness 20 ga, Overall Length 4 1/2 in, Frame Depth 2 in, Rough Opening Length 30 in, Maximum Pressure 1 in wc

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