Damper Properties
Damper Purpose
Damper Type
Material Type
Frame Depth
Blade Style
Blade Action
Blade Depth
Temperature Rating
Air Performance Stats
Air Velocity (fpm)
Static Pressure (in. w.g.)
Pressure Drop (in. w.g. @ 1000 fpm)
Damper Sizing
Max Single Panel Size
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\03 [Aluminum]\01 [225-B]\thumb_LD - 225-B.png)
Model: 225-B
Damper Type: Backdraft - Backdraft
Material: Aluminum
Blade Type: Single Thickness - Parallel Action
![](/tools\uss\Louvers & Dampers\06 [Multi-Zone Dampers]\00 [No Category]\01 [354]\thumb_LD - 354.png)
Model: 354
Damper Type: Balancing - Multi-Zone
Material: Galvanized Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\06 [Multi-Zone Dampers]\00 [No Category]\03 [356]\thumb_LD - 356.png)
Model: 356
Damper Type: Balancing - Multi-Zone
Material: Galvanized Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\06 [Multi-Zone Dampers]\00 [No Category]\04 [356-12]\thumb_LD - 356-12.png)
Model: 356-12
Damper Type: Balancing - Multi-Zone
Material: Galvanized Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\02 [Stainless Steel]\03 [580-BD]\thumb_LD - 580-BD.png)
Model: 580-BD
Damper Type: Industrial - Backdraft
Material: Fabricated Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\01 [Aluminum Dampers]\02 [Single Blade]\01 [A11]\thumb_LD - A11.png)
Model: A11
Damper Type: Volume Control - Aluminum
Material: Aluminum
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\01 [Aluminum Dampers]\01 [Airfoil Blade]\01 [A28 - A29]\thumb_LD - A28-A29.png)
Model: A28-29
Damper Type: Volume Control - Aluminum
Material: Aluminum
Blade Type: Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\01 [Aluminum Dampers]\03 [Single Thickness Blade]\01 [AD1 - AD2]\thumb_LD - AD1-AD2.png)
Model: AD1/AD2
Damper Type: Volume Control - Aluminum
Material: Aluminum
Blade Type: Single Thickness - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\01 [Aluminum Dampers]\01 [Airfoil Blade]\08 [AD5 - AD6]\thumb_LD - AD5-AD6.png)
Model: AD5/AD6
Damper Type: Volume Control - Aluminum
Material: Aluminum
Blade Type: Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\03 [Round and Transitional Dampers]\01 [Galvanized Steel]\06 [AF53]\thumb_LD - AF53.png)
Model: AF53
Damper Type: Volume Control - Round
Material: Galvanized Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\02 [Steel Dampers]\03 [Single Thickness Blade]\05 [D1770]\thumb_LD - D1770.png)
Model: D1770
Damper Type: Volume Control - Steel
Material: Galvanized Steel
Blade Type: Single Thickness - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\02 [Steel Dampers]\03 [Single Thickness Blade]\01 [D182]\thumb_LD - D182.png)
Model: D182
Damper Type: Volume Control - Steel
Material: Stainless Steel
Blade Type: Single Thickness - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\03 [Round and Transitional Dampers]\01 [Galvanized Steel]\07 [D260DW]\thumb_LD - D260DW.png)
Model: D260DW
Damper Type: Volume Control - Round
Material: Galvanized Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\03 [Aluminum]\02 [D335]\thumb_LD - D335.png)
Model: D335
Damper Type: Backdraft - Backdraft
Material: Aluminum
Blade Type: Single Thickness - Parallel Action
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\01 [Galvanized Steel]\02 [D388]\thumb_LD - D388.png)
Model: D388
Damper Type: Backdraft - Round
Material: Galvanized Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\03 [Aluminum]\03 [D389]\thumb_LD - D389.png)
Model: D389
Damper Type: Backdraft - Round
Material: Aluminum
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\02 [Stainless Steel]\01 [D390]\thumb_LD - D390.png)
Model: D390
Damper Type: Backdraft - Round
Material: Stainless Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\02 [Steel Dampers]\03 [Single Thickness Blade]\02 [D395]\thumb_LD - D395.png)
Model: D395
Damper Type: Volume Control - Steel
Material: Galvanized Steel
Blade Type: Single Thickness - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\02 [Stainless Steel]\02 [D503]\thumb_LD - D503.png)
Model: D503
Damper Type: Backdraft - Backdraft
Material: Stainless Steel
Blade Type: Single Thickness - Parallel Action
![](/tools\uss\Louvers & Dampers\02 [Steel Dampers]\04 [Insulated Blade]\01 [DID200]\thumb_LD - DID200.png)
Model: DID200
Damper Type: Volume Control - Steel
Material: Galvanized Steel
Blade Type: Insulated - Parallel Action
![](/tools\uss\Louvers & Dampers\02 [Steel Dampers]\03 [Single Thickness Blade]\04 [GB1 - GB2]\thumb_LD - GB1-GB2.png)
Model: GB1/GB2
Damper Type: Volume Control - Steel
Material: Galvanized Steel
Blade Type: Single Thickness - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\02 [Steel Dampers]\03 [Single Thickness Blade]\03 [GD1 - GD2]\thumb_LD - GD1-GD2.png)
Model: GD1 / GD2
Damper Type: Volume Control - Steel
Material: Galvanized Steel
Blade Type: Single Thickness - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\02 [Steel Dampers]\01 [Airfoil Blade]\01 [GD26 - GD27]\thumb_LD - GD26-GD27.png)
Model: GD26 / GD27
Damper Type: Volume Control - Steel
Material: Galvanized Steel
Blade Type: Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\01 [Airfoil Blade]\01 [GI30]\thumb_LD - GI30.png)
Model: GI30
Damper Type: Industrial - Industrial
Material: Galvanized Steel
Blade Type: Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\03 [Single Thickness Blade]\01 [GI33]\thumb_LD - GI33.png)
Model: GI33
Damper Type: Industrial - Industrial
Material: Galvanized Steel
Blade Type: Single Thickness - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\03 [Single Thickness Blade]\02 [GI34]\thumb_LD - GI34.png)
Model: GI34
Damper Type: Industrial - Industrial
Material: Galvanized Steel
Blade Type: Single Thickness - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\03 [Single Thickness Blade]\03 [GI41]\thumb_LD - GI41.png)
Model: GI41
Damper Type: Industrial - Industrial
Material: Galvanized Steel
Blade Type: Single Thickness - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\03 [Single Thickness Blade]\04 [GI42]\thumb_LD - GI42.png)
Model: GI42
Damper Type: Industrial - Industrial
Material: Galvanized Steel
Blade Type: Single Thickness - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\03 [Single Thickness Blade]\05 [GI43]\thumb_LD - GI43.png)
Model: GI43
Damper Type: Industrial - Industrial
Material: Galvanized Steel
Blade Type: Single Thickness - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\01 [Airfoil Blade]\02 [GI50]\thumb_LD - GI50.png)
Model: GI50
Damper Type: Industrial - Industrial
Material: Galvanized Steel
Blade Type: Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\01 [Airfoil Blade]\03 [GI51]\thumb_LD - GI51.png)
Model: GI51
Damper Type: Industrial - Industrial
Material: Galvanized Steel
Blade Type: Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\01 [Airfoil Blade]\04 [GI54]\thumb_LD - GI54.png)
Model: GI54
Damper Type: Industrial - Industrial
Material: Galvanized Steel
Blade Type: Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\01 [Airfoil Blade]\05 [GI55]\thumb_LD - GI55.png)
Model: GI55
Damper Type: Industrial - Industrial
Material: Galvanized Steel
Blade Type: Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\02 [Single Blade]\01 [GI80]\thumb_LD - GI80.png)
Model: GI80
Damper Type: Industrial - Round
Material: Fabricated Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\02 [Single Blade]\02 [GI81]\thumb_LD - GI81.png)
Model: GI81
Damper Type: Industrial - Round
Material: Fabricated Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\03 [Aluminum]\06 [GI850]\thumb_LD - GI850.png)
Model: GI850
Damper Type: Backdraft - Backdraft
Material: Aluminum
Blade Type: Tear-drop - Parallel Action
![](/tools\uss\Louvers & Dampers\02 [Steel Dampers]\02 [Single Blade]\01 [L111]\thumb_LD - L111.png)
Model: L111
Damper Type: Balancing - Steel
Material: Galvanized Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\03 [Round and Transitional Dampers]\01 [Galvanized Steel]\05 [L112]\thumb_LD - L112.png)
Model: L112
Damper Type: Volume Control - Round
Material: Galvanized Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\02 [Steel Dampers]\01 [Airfoil Blade]\02 [L517 - L518]\thumb_LD - L517-L518.png)
Model: L517 / L518
Damper Type: Volume Control - Steel
Material: Galvanized Steel
Blade Type: Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\04 [Industrial High Temp Dampers]\01 [Airfoil Blade]\06 [L545INS]\thumb_LD - L545INS.png)
Model: L545INS
Damper Type: Industrial - Industrial
Material: Galvanized Steel
Blade Type: Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\03 [Round and Transitional Dampers]\03 [Aluminum]\01 [L56]\thumb_LD - L56.png)
Model: L56
Damper Type: Volume Control - Round
Material: Aluminum
Blade Type: Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\03 [Round and Transitional Dampers]\01 [Galvanized Steel]\01 [L70]\thumb_LD - L70.png)
Model: L70
Damper Type: Volume Control - Round
Material: Galvanized Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\03 [Round and Transitional Dampers]\01 [Galvanized Steel]\03 [L70GL]\thumb_LD - L70GL.png)
Model: L70GL
Damper Type: Volume Control - Round
Material: Galvanized Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\03 [Round and Transitional Dampers]\01 [Galvanized Steel]\02 [L70R]\thumb_LD - L70R.png)
Model: L70R
Damper Type: Volume Control - Round
Material: Galvanized Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\03 [Round and Transitional Dampers]\03 [Aluminum]\02 [L75]\thumb_LD - L75.png)
Model: L75
Damper Type: Volume Control - Round
Material: Aluminum
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\03 [Round and Transitional Dampers]\02 [Stainless Steel]\01 [L80]\thumb_LD - L80.png)
Model: L80
Damper Type: Volume Control - Round
Material: Stainless Steel
Blade Type: Single Thickness - Single Action
![](/tools\uss\Louvers & Dampers\03 [Round and Transitional Dampers]\03 [Aluminum]\03 [L85]\thumb_LD - L85.png)
Model: L85
Damper Type: Volume Control - Round
Material: Aluminum
Blade Type: Pin-Lock - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\03 [Aluminum]\05 [PR55]\thumb_LD - PR55.png)
Model: PR55
Damper Type: Backdraft - Backdraft
Material: Aluminum
Blade Type: Single Thickness - Parallel Action
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\01 [Galvanized Steel]\01 [PR66]\thumb_LD - PR66.png)
Model: PR66
Damper Type: Backdraft - Backdraft
Material: Galvanized Steel
Blade Type: Single Thickness - Parallel Action
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\01 [Galvanized Steel]\03 [PRI4]\thumb_LD - PRI4.png)
Model: PRI4
Damper Type: Backdraft - Backdraft
Material: Galvanized Steel
Blade Type: Tear-drop - Parallel Action
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\01 [Galvanized Steel]\04 [PRI9]\thumb_LD - PRI9.png)
Model: PRI9
Damper Type: Backdraft - Backdraft
Material: Galvanized Steel
Blade Type: Tear-drop - Parallel Action
![](/tools\uss\Louvers & Dampers\05 [Brackdraft Dampers]\03 [Aluminum]\04 [PRL]\thumb_LD - PRL.png)
Model: PRL
Damper Type: Backdraft - Backdraft
Material: Aluminum
Blade Type: Single Thickness - Parallel Action
![](/tools\uss\Louvers & Dampers\01 [Aluminum Dampers]\01 [Airfoil Blade]\02 [T28B]\thumb_LD - T28B.png)
Model: T28B
Damper Type: Volume Control - Aluminum
Material: Aluminum
Blade Type: Insulated Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\01 [Aluminum Dampers]\01 [Airfoil Blade]\04 [T28B4]\thumb_LD - T28B4.png)
Model: T28B4
Damper Type: Volume Control - Aluminum
Material: Aluminum
Blade Type: Insulated Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\01 [Aluminum Dampers]\01 [Airfoil Blade]\05 [T28B4I]\thumb_LD - T28B4I.png)
Model: T28B4I
Damper Type: Volume Control - Aluminum
Material: Aluminum
Blade Type: Insulated Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\01 [Aluminum Dampers]\01 [Airfoil Blade]\03 [T28BI]\thumb_LD - T28BI.png)
Model: T28BI
Damper Type: Volume Control - Aluminum
Material: Aluminum
Blade Type: Insulated Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\01 [Aluminum Dampers]\01 [Airfoil Blade]\06 [T29B]\thumb_LD - T29B.png)
Model: T29B
Damper Type: Volume Control - Aluminum
Material: Aluminum
Blade Type: Insulated Airfoil - Parallel / Opposed Action
![](/tools\uss\Louvers & Dampers\01 [Aluminum Dampers]\01 [Airfoil Blade]\07 [T29B4]\thumb_LD - T29B4.png)
Model: T29B4
Damper Type: Volume Control - Aluminum
Material: Aluminum
Blade Type: Insulated Airfoil - Parallel / Opposed Action