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Dayton 21"H-W 5 1/4"L Aluminum Backdraft Damper: For 18 in Fan, Single Panel, 21 in H - Wall-Mount Backdraft Dampers
DaytonWall-Mount Backdraft Dampers

Dayton 21"H-W 5 1/4"L Aluminum Backdraft Damper: For 18 in Fan, Single Panel, 21 in H

The Dayton 21"H-W 5 1/4"L Aluminum Backdraft Damper (SKU 3HHN7) is a wall-mount backdraft damper designed for use with an 18-inch fan. It features a single-panel flat blade construction, measures 21 inches in height…

SKU 3G-OTH-77269

Brand
Dayton
Item
21"H-W 5 1/4"L Aluminum Backdraft Damper: For 18 in Fan, Single Panel, 21 in H
Category
Wall-Mount Backdraft Dampers
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Technical Specifications

Dayton
Manufacturer Part Number
3HHN7
Type
Single Panel, 21 in W
D
3 in
H
21 in
Blade Type
Flat Blade
Airflow Direction
Horizontal
Mounting Position
Vertical
Maximum Air Velocity
2500 fpm
View Full Spec Sheet

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Dayton Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Dayton 21"H-W 5 1/4"L Aluminum Backdraft Damper (SKU 3HHN7) is a wall-mount backdraft damper designed for use with an 18-inch fan. It features a single-panel flat blade construction, measures 21 inches in height, 21 inches in width, and 3 inches in depth, and is rated for a maximum air velocity of 2500 fpm with horizontal airflow and vertical mounting.

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 3HHN7 backdraft damper used for?

The Dayton 3HHN7 backdraft damper prevents reverse airflow in exhaust or intake systems. It is designed for wall-mounting with an 18-inch fan, allowing air to flow horizontally while blocking backdrafts when the fan is off.

What are the specifications of the Dayton 3HHN7 backdraft damper?

The Dayton 3HHN7 is a single-panel flat blade damper measuring 21 in H x 21 in W x 3 in D. It is rated for a maximum air velocity of 2500 fpm, mounts vertically, and directs airflow horizontally. The aluminum construction resists corrosion.

Where to buy the Dayton 3HHN7 backdraft damper worldwide?

3G Electric supplies the Dayton 3HHN7 backdraft damper to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this and other industrial ventilation components.

How to install a Dayton wall-mount backdraft damper?

Mount the Dayton damper vertically in the wall opening, ensuring the airflow arrow points in the intended direction. Secure the frame with appropriate fasteners and seal the perimeter. The flat blades should swing freely to prevent binding during 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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