Dayton 25"H-W 4.5"L Aluminum Backdraft Damper: For 20 in Fan, Single Panel, 25 in H
The Dayton 25"H-W 4.5"L Aluminum Backdraft Damper (SKU 3G-OTH-74762) is a ceiling/roof-mount backdraft damper designed for a 20-inch fan. It features a single-panel flat blade design with vertical airflow direction…
SKU 3G-OTH-74762
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
The Dayton 25"H-W 4.5"L Aluminum Backdraft Damper (SKU 3G-OTH-74762) is a ceiling/roof-mount backdraft damper designed for a 20-inch fan. It features a single-panel flat blade design with vertical airflow direction and horizontal mounting, supporting a maximum air velocity of 2250 fpm. The unit measures 25 inches in height, 25 inches in width, and 2 inches in depth, with felt construction.
Frequently Asked Questions
What is the Dayton backdraft damper used for?
The Dayton backdraft damper prevents reverse airflow in ceiling or roof exhaust systems. It mounts horizontally with a 20-inch fan, using a single-panel flat blade that opens under forward airflow and closes when the fan stops, maintaining ventilation efficiency.
What are the specifications of the Dayton backdraft damper?
The Dayton measures 25 in H by 25 in W by 2 in D, with a 4.5 in L collar. It handles vertical airflow at up to 2250 fpm, uses a flat blade, and is constructed from aluminum with felt seals. It is designed for horizontal mounting with a 20-inch fan.
Where to buy the Dayton backdraft damper worldwide?
3G Electric supplies the Dayton backdraft damper to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this item.
How to install the Dayton backdraft damper?
Mount the Dayton horizontally in the duct or roof curb, ensuring the airflow arrow points upward for vertical exhaust. Secure the flange with screws and seal joints with duct sealant. Verify the blade moves freely before connecting the fan. Follow local codes for safe installation.
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3G Electric supplies Dayton ceiling/roof-mount backdraft dampers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
