Item | Universal Backdraft Damper |
Type | No Flange, Horizontal Mount |
Damper Size (In.) | 33-3/4 x 33-3/4 |
Overall Size (In.) | 33 3/4 x 33 3/4 |
Max. Velocity (FPM) | 2,000 fpm |
Construction Material | G-90 Galvanized Steel Frame and Aluminum Blades |
Outside Flange (In.) | 33-3/4 x 33-3/4 |
Includes | Pre-Punched Conduit Hole Knock-Out, Felted Edges for Quiet Operation |
Overall Width | 33 3/4 in |
Overall Length | 4 1/2 in |
Overall Height | 33 3/4 in |
Blade | Aluminum Blade w/ Felt Seal |
Rough Opening Dims | 34 in x 34 in |
Seal Material | Not Applicable |
Fusible Link Temperature | Not Applicable |
For Nominal Duct Diameter | 34 in |
Opening Type | Motorized |
Rough Opening Length | 34 in |
Blade Type | Flat Blade |
Blade Seal Material | Felt |
Blade Material Thickness | 26 ga |
Damper Type | Dynamic |
Switch Action | Normally Closed |
For Duct Shape | Square |
Blade Orientation | Parallel Blades |
For Fuel Type | Not Applicable |
Blade Material | Aluminum |
Bushing Material | Nylon |
Closure Velocity Rating | 2,000 fpm |
Fits Fan Diameter | 34 in |
Frame Less Flange | 33 3/4 |
Pressure Drop @ 1000 fpm (AMCA 5.2) | Not Applicable |
Maximum Air Velocity | 2250 fpm |
Number of Panels | 1 |
Rough Opening Shape | Square |
Rough Opening Width | 34 in |
Single Acting/Double Acting | Single Acting |
Minimum Ambient Temperature | -40 Degrees F |
Overall Diameter | Not Applicable |
Counterbalanced | Yes |
Damper Finish | Mill Finish |
ACMA Leakage Class | Not Applicable |
Airflow Direction | Horizontal, Vertical |
Flange Type | None |
Flange Width | Not Applicable |
Mounting Position | Horizontal, Vertical |
Frame Material | Galvanized Steel |
Series | 611 |
Damper Application | Backdraft |
Closure Type | Spring |
Free Area | 7.7 sq ft |
Maximum Ambient Temperature | 180 Degrees F |
Frame Material Thickness | 20 ga |
Rough Opening Diameter | 34 in |
Frame Depth | 2 in |
Maximum Pressure | 1 in wc |
Country of Origin (subject to change) | United States |
Package Quantity | 1 |
Backdraft Damper, Horizontal, 33-3/4Sq, DAYTON, Mfr# 3HHL9
$134,99
-8% / ea
with subscription
Free shipping will be applied on orders over $50
33.75 In.H-W 4.5 In.L Aluminum Backdraft Dampr, Damper Application Backdraft, For Nominal Duct Diameter 34 in, Frame Material Galvanized Steel, Number of Panels 1, Maximum Air Velocity 2250 fpm, Overall Height 33 3/4 in, Rough Opening Diameter 34 in, Rough Opening Shape Square, Fits Fan Diameter 34 in, For Duct Shape Square, Free Area 7.7 sq ft, Overall Width 33 3/4 in, Frame Material Thickness 20 ga, Overall Length 4 1/2 in, Frame Depth 2 in, Rough Opening Length 34 in, Maximum Pressure 1 in wc
9999 in stock
Must order in multiples of 1
Subtotal:
$134.99
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