18 in 21"H-W 5.75"L Aluminum Backdraft Damper, 18-1/2 in x 18-1/2 in, Aluminum MPN:4C558
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Free Shipping
In Stock
SKU
510-G3216062
18 in 21"H-W 5.75"L Aluminum Backdraft Damper, 18-1/2 in x 18-1/2 in, Aluminum
The Dayton 18 in x 21 in Aluminum Backdraft Damper is a high-performance solution for controlling airflow in ducted systems. Its compact design and aluminum construction make it ideal for use in tight spaces, while its maximum air velocity of 2500 fpm ensures efficient airflow management. Suitable for a variety of applications, including residential and commercial HVAC systems, this damper helps prevent backdrafts, reduces energy losses, and maintains a consistent indoor air quality. Its durable construction and easy installation make it a reliable choice for professionals and DIYers alike, perfect for new constructions or retrofits of existing systems.
Top product features:
- Aluminum frame provides durability and resistance to corrosion
- Backdraft damper application allows for controlled airflow and reduced energy loss
- Maximum air velocity of 2500 fpm enables efficient airflow and minimizes pressure drop
Top product applications:
- Backdraft damper
- Backdraft application
- Not applicable duct shape
21 In.H-W 5.75 In.L Aluminum Backdraft Damper, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Aluminum, Number of Panels 1, Maximum Air Velocity 2500 fpm, Overall Height 21 in, Rough Opening Diameter 18 1/2 in, Rough Opening Shape Square, Fits Fan Diameter 18 in, For Duct Shape Not Applicable, Free Area 2 sq ft, Overall Width 21 in, Frame Material Thickness 0.8 in, Overall Length 5 3/4 in, Connection Type Not Applicable, Frame Depth 2 1/2 in
Additional Information
- Country of Origin: US
- Drop Ship Item: No
- Blind Ship Eligible: No
- LTL Freight Required: No
- Lead Time: Ships in 1 days
- Minimum Order Quantity: 1
- Unit of Measure: EA
- Package Length: 22.00
- Package Width: 21.30
- Package Height: 2.70
- Package Weight: 5.40
Product info last updated on February 17, 2026 6:56am UTC
Category: Ventilation