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Dayton 17.75"H-W 4.5"L Aluminum Backdraft Dampr: For 12 in Fan, Single Panel, 17 3/4 in H - Wall-Mount Backdraft Dampers
DaytonWall-Mount Backdraft Dampers

Dayton 17.75"H-W 4.5"L Aluminum Backdraft Dampr: For 12 in Fan, Single Panel, 17 3/4 in H

The Dayton 4HX77 is a wall-mount backdraft damper with a single-panel, flat-blade design, measuring 17.75 inches in height and width with a 4.5-inch length, and is intended for use with a 12-inch fan. It is…

SKU 3G-OTH-75964

Brand
Dayton
Item
17.75"H-W 4.5"L Aluminum Backdraft Dampr: For 12 in Fan, Single Panel, 17 3/4 in H
Category
Wall-Mount Backdraft Dampers
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Technical Specifications

Dayton
Manufacturer Part Number
4HX77
Type
Single Panel, 17 3/4 in W
H
17 3/4 in
Blade Type
Flat Blade
Airflow Direction
Horizontal
Mounting Position
Vertical
Maximum Air Velocity
2250 fpm
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Dayton Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Dayton 4HX77 is a wall-mount backdraft damper with a single-panel, flat-blade design, measuring 17.75 inches in height and width with a 4.5-inch length, and is intended for use with a 12-inch fan. It is constructed with aluminum and supports horizontal airflow in a vertical mounting position, with a maximum air velocity of 2250 fpm.

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 4HX77 backdraft damper used for?

The Dayton 4HX77 is a wall-mount backdraft damper designed to prevent reverse airflow in ventilation systems. It is used with a 12-inch fan, allowing air to flow horizontally while blocking backdrafts when the fan is off, making it suitable for exhaust or intake applications in commercial or industrial settings.

What are the specifications of the Dayton 4HX77 backdraft damper?

The Dayton 4HX77 is a single-panel, flat-blade aluminum damper measuring 17.75 inches high and wide with a 4.5-inch length. It supports horizontal airflow, mounts vertically, and handles a maximum air velocity of 2250 fpm. It is designed for use with a 12-inch fan and carries the MPN 4HX77.

Where to buy the Dayton 4HX77 backdraft damper worldwide?

The Dayton 4HX77 backdraft damper is available to order through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide locations, ensuring you receive the correct part for your ventilation system without dealing with international shipping complexities.

How to install the Dayton 4HX77 backdraft damper?

Install the Dayton 4HX77 damper in a vertical mounting position with the airflow direction set to horizontal. Secure it to the wall or duct opening using appropriate fasteners, ensuring the flat blades move freely. Align the damper with the 12-inch fan outlet to allow proper backdraft prevention during fan operation.

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 wall-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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