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Dayton 27.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 28 in Fan, For 28 in Nominal Duct Dia - Universal-Mount Backdraft Dampers
DaytonUniversal-Mount Backdraft Dampers

Dayton 27.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 28 in Fan, For 28 in Nominal Duct Dia

The Dayton 27.8"H-W 4.5"L Alu Spring Bkdrft Dampr is a universal-mount backdraft damper designed for a 28 in fan and 28 in nominal duct diameter. It features a single-panel, flat blade construction with vertical…

SKU 3G-OTH-74572

Brand
Dayton
Item
27.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 28 in Fan, For 28 in Nominal Duct Dia
Category
Universal-Mount Backdraft Dampers
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Technical Specifications

Dayton
Manufacturer Part Number
3HHL7
Type
For 28 in Nominal Duct Dia, Single Panel
Blade Type
Flat Blade
Airflow Direction
Vertical
Mounting Position
Vertical
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 27.8"H-W 4.5"L Alu Spring Bkdrft Dampr is a universal-mount backdraft damper designed for a 28 in fan and 28 in nominal duct diameter. It features a single-panel, flat blade construction with vertical airflow direction and vertical mounting position. 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 3HHL7 backdraft damper used for?

The Dayton 3HHL7 backdraft damper prevents reverse airflow in vertical exhaust or intake ducts. It is designed for 28-inch fans and nominal 28-inch duct diameters, commonly used in commercial HVAC systems to maintain one-way airflow and protect equipment.

What are the specifications of the Dayton 3HHL7 backdraft damper?

The Dayton 3HHL7 is a single-panel, flat-blade damper with a 27.8-inch height and 4.5-inch length. It supports vertical airflow direction, vertical mounting, and a maximum air velocity of 2000 fpm. It fits 28-inch nominal duct diameters and 28-inch fans.

Where to buy the Dayton 3HHL7 backdraft damper worldwide?

3G Electric supplies the Dayton 3HHL7 backdraft damper worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.

How to install the Dayton 3HHL7 backdraft damper?

Install the Dayton 3HHL7 damper vertically in the duct with airflow direction matching the arrow on the frame. Ensure the damper is securely mounted and blades move freely. For best performance, verify the duct diameter matches 28 inches and the fan is compatible.

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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