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Dayton 19.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 20 in Fan, For 20 in Nominal Duct Dia - Universal-Mount Backdraft Dampers
DaytonUniversal-Mount Backdraft Dampers

Dayton 19.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 20 in Fan, For 20 in Nominal Duct Dia

The Dayton 19.8"H-W 4.5"L Alu Spring Bkdrft Dampr (SKU 3HHL6) is a universal-mount backdraft damper designed for use with a 20-inch fan and 20-inch nominal duct diameter. It features a single-panel flat blade…

SKU 3G-OTH-74522

Brand
Dayton
Item
19.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 20 in Fan, For 20 in Nominal Duct Dia
Category
Universal-Mount Backdraft Dampers
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Technical Specifications

Dayton
Manufacturer Part Number
3HHL6
Type
For 20 in Nominal Duct Dia, Single Panel
Blade Type
Flat Blade
Airflow Direction
Horizontal
Mounting Position
Vertical
Maximum Air Velocity
2000 fpm
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Dayton Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Dayton 19.8"H-W 4.5"L Alu Spring Bkdrft Dampr (SKU 3HHL6) is a universal-mount backdraft damper designed for use with a 20-inch fan and 20-inch nominal duct diameter. It features a single-panel flat blade construction, supports horizontal airflow direction, and is intended for vertical 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 3HHL6 backdraft damper used for?

The Dayton 3HHL6 backdraft damper prevents reverse airflow in 20-inch duct systems. It is used with a 20-inch fan, mounts vertically, and handles horizontal airflow. Common in HVAC exhaust and ventilation applications where one-way airflow is critical.

What are the specifications of the Dayton 3HHL6 backdraft damper?

The Dayton 3HHL6 is a single-panel flat blade damper for 20-inch nominal duct diameter. It has a 19.8-inch height, 4.5-inch length, supports horizontal airflow, mounts vertically, and handles maximum air velocity of 2000 fpm. Blade material is aluminum.

Where to buy the Dayton 3HHL6 backdraft damper worldwide?

3G Electric supplies the Dayton 3HHL6 backdraft damper worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine Dayton parts and support procurement across 14 departments.

How to install the Dayton 3HHL6 backdraft damper?

Install the Dayton 3HHL6 damper in a vertical mounting position with airflow direction horizontal. Ensure the duct is 20-inch nominal diameter and the fan matches. Secure the damper frame to the duct flange, and verify the flat blades open freely with airflow.

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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