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Dayton 25"H-W 4.5"L Aluminum Backdraft Damper: For 20 in Fan, Single Panel, 25 in H - Ceiling/Roof-Mount Backdraft Dampers
DaytonCeiling/Roof-Mount Backdraft Dampers

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 4HX67) 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…

SKU 3G-OTH-74762

Brand
Dayton
Item
25"H-W 4.5"L Aluminum Backdraft Damper: For 20 in Fan, Single Panel, 25 in H
Category
Ceiling/Roof-Mount Backdraft Dampers
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Technical Specifications

Dayton
Manufacturer Part Number
4HX67
Type
Single Panel, 25 in W, Felt
D
2 in
H
25 in
Blade Type
Flat Blade
Airflow Direction
Vertical
Mounting Position
Horizontal
Maximum Air Velocity
2250 fpm
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Dayton Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Dayton 25"H-W 4.5"L Aluminum Backdraft Damper (SKU 4HX67) 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.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the Dayton 4HX67 backdraft damper used for?

The Dayton 4HX67 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 4HX67 backdraft damper?

The Dayton 4HX67 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 4HX67 backdraft damper worldwide?

3G Electric supplies the Dayton 4HX67 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 4HX67 backdraft damper?

Mount the Dayton 4HX67 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.

Used in

Common applications for Dayton
HVAC ventilation — DAYTON centrifugal upblast roof exhaust fans (SKU 7M7U3) for kitchen exhaust systems
Mechanical power transmission — DAYTON HTD timing pulleys (SKU 404GV0) for conveyor belt drives
Process water handling — DAYTON self-priming centrifugal pumps (SKU 2ZXT4) for dewatering or transfer
Roofing and building services — DAYTON fixed ventilated roof curbs (SKU 4HX59) for filtered supply fan installations
Material handling — DAYTON latch assemblies (SKU 2KEN4) for electric chain hoist hook safety
Industrial air movement — DAYTON downblast roof exhaust fans (SKU 3HFL9) for clean air exhaust in manufacturing plants

Dayton Products

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.

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