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Dayton 7.75"H-W 4.5"L Aluminum Backdraft Damper: For 8 in Fan, For 8 in Nominal Duct Dia - Universal-Mount Backdraft Dampers
DaytonUniversal-Mount Backdraft Dampers

Dayton 7.75"H-W 4.5"L Aluminum Backdraft Damper: For 8 in Fan, For 8 in Nominal Duct Dia

The Dayton 7.75"H-W 4.5"L Aluminum Backdraft Damper (SKU 3HHL4) is a universal-mount backdraft damper designed for use with an 8-inch fan and 8-inch nominal duct diameter. It features a flat blade type, supports…

SKU 3G-OTH-74368

Brand
Dayton
Item
7.75"H-W 4.5"L Aluminum Backdraft Damper: For 8 in Fan, For 8 in Nominal Duct Dia
Category
Universal-Mount Backdraft Dampers
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Technical Specifications

Dayton
Manufacturer Part Number
3HHL4
Type
For 8 in Nominal Duct Dia, Single Panel
Blade Type
Flat Blade
Airflow Direction
Horizontal
Mounting Position
Horizontal
Maximum Air Velocity
2000 fpm
View Full Spec Sheet

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

Product Description

The Dayton 7.75"H-W 4.5"L Aluminum Backdraft Damper (SKU 3HHL4) is a universal-mount backdraft damper designed for use with an 8-inch fan and 8-inch nominal duct diameter. It features a flat blade type, supports horizontal airflow direction, and is intended for horizontal mounting positions. The damper has a maximum air velocity of 2000 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 3HHL4 backdraft damper used for?

The Dayton 3HHL4 backdraft damper prevents reverse airflow in horizontal duct systems. It is designed for use with an 8-inch fan and 8-inch nominal duct diameter, with a maximum air velocity of 2000 fpm. Common applications include exhaust ventilation and HVAC systems where one-way airflow is required.

What are the specifications of the Dayton 3HHL4 backdraft damper?

The Dayton 3HHL4 is a single-panel, flat-blade backdraft damper with a 7.75-inch height and 4.5-inch length. It supports horizontal airflow direction, mounts horizontally, and handles a maximum air velocity of 2000 fpm. It is designed for 8-inch nominal duct diameter and 8-inch fan compatibility.

Where to buy the Dayton 3HHL4 backdraft damper worldwide?

3G Electric supplies the Dayton 3HHL4 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 pricing and lead time on this universal-mount backdraft damper.

How to install the Dayton 3HHL4 backdraft damper?

Install the Dayton 3HHL4 damper in a horizontal duct section with airflow direction matching the arrow on the housing. Ensure the damper is mounted level so the flat blades close freely under gravity. Secure with sheet metal screws and seal joints with duct tape or mastic to prevent leakage.

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 universal-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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