We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
RFQ CartGet a QuoteSign inSign up
Dayton 44.75"H-W Alu Universal Backdraft Dampr: For 42 in Fan, Single Panel, 44 3/4 in H - Universal-Mount Backdraft Dampers
DaytonUniversal-Mount Backdraft Dampers

Dayton 44.75"H-W Alu Universal Backdraft Dampr: For 42 in Fan, Single Panel, 44 3/4 in H

The Dayton 3HHT2 is a universal-mount backdraft damper designed for horizontal airflow and horizontal mounting. It features a single-panel aluminum construction with felt seals, measuring 44.75 inches in both height…

SKU 3G-OTH-74743

Brand
Dayton
Item
44.75"H-W Alu Universal Backdraft Dampr: For 42 in Fan, Single Panel, 44 3/4 in H
Category
Universal-Mount Backdraft Dampers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

Dayton
Manufacturer Part Number
3HHT2
Type
Single Panel, 44 3/4 in W, Felt
H
44 3/4 in
Airflow Direction
Horizontal
Mounting Position
Horizontal
Maximum Air Velocity
2250 fpm
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The Dayton 3HHT2 is a universal-mount backdraft damper designed for horizontal airflow and horizontal mounting. It features a single-panel aluminum construction with felt seals, measuring 44.75 inches in both height and width, and is intended for use with a 42-inch fan. The damper supports a maximum air velocity of 2250 fpm.

Frequently Asked Questions

What is the Dayton 3HHT2 backdraft damper used for?

The Dayton 3HHT2 is a universal-mount backdraft damper that prevents reverse airflow in horizontal ventilation systems. It is designed for use with a 42-inch fan, allowing air to flow in one direction while closing automatically when the fan stops, protecting equipment and maintaining system efficiency.

What are the specifications of the Dayton 3HHT2 damper?

The Dayton 3HHT2 is a single-panel aluminum backdraft damper with felt seals, measuring 44 3/4 inches in both height and width. It is designed for horizontal mounting and horizontal airflow, with a maximum air velocity of 2250 fpm. The manufacturer part number is 3HHT2.

Where to buy the Dayton 3HHT2 damper worldwide?

3G Electric supplies the Dayton 3HHT2 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 availability and lead time on this and other Dayton ventilation components.

How to install the Dayton 3HHT2 backdraft damper?

Install the Dayton 3HHT2 damper in a horizontal duct section with the airflow arrow pointing away from the fan. Ensure the damper frame is securely mounted and the felt seals are intact for proper closure. Follow standard HVAC practices for duct connections and verify free movement of the single panel before 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 universal-mount backdraft dampers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
32.75"H-W Alu Universal Backdraft Dampr: For 30 in Fan, Single Panel, 32 3/4 in H, 32 3/4 in W, Felt (MPN 3HHT1). Key specifications — Airflow Direction: Horizontal; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Vertical.
Dayton
32.75"H-W Alu Universal Backdraft Dampr: For 30 in Fan, Single Panel, 32 3/4 in H, 32 3/4 in W, Felt (MPN 3HHT1). Key specifications — Airflow Direction: Horizontal; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Vertical.
29.75"H-W 4.5"L Aluminum Backdraft Dampr: For 30 in Fan, For 30 in Nominal Duct Dia, Single Panel (MPN 3HHL8). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Vertical.
Dayton
29.75"H-W 4.5"L Aluminum Backdraft Dampr: For 30 in Fan, For 30 in Nominal Duct Dia, Single Panel (MPN 3HHL8). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Vertical.
35.75"H-W 4.5"L Aluminum Backdraft Dampr: For 36 in Fan, For 36 in Nominal Duct Dia, Single Panel (MPN 3HHN1). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Vertical.
Dayton
35.75"H-W 4.5"L Aluminum Backdraft Dampr: For 36 in Fan, For 36 in Nominal Duct Dia, Single Panel (MPN 3HHN1). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Vertical.
27.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 28 in Fan, For 28 in Nominal Duct Dia, Single Panel (MPN 3HHL7). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Vertical.
Dayton
27.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 28 in Fan, For 28 in Nominal Duct Dia, Single Panel (MPN 3HHL7). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Vertical.
15.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 16 in Fan, For 16 in Nominal Duct Dia, Single Panel (MPN 3HHL5). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Vertical.
Dayton
15.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 16 in Fan, For 16 in Nominal Duct Dia, Single Panel (MPN 3HHL5). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Vertical.
Manual Damper: For 36 in Fan, Single Panel, 35 in W, 1 5/8 in D, Aluminum, Front Flange, Horizontal (MPN 3HHR5). Key specifications — Airflow Direction: Horizontal; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Vertical.
Dayton
Manual Damper: For 36 in Fan, Single Panel, 35 in W, 1 5/8 in D, Aluminum, Front Flange, Horizontal (MPN 3HHR5). Key specifications — Airflow Direction: Horizontal; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Vertical.

More from Dayton

View all Dayton parts →
7.75"H-W 4.5"L Aluminum Backdraft Damper: For 8 in Fan, For 8 in Nominal Duct Dia, Single Panel (MPN 3HHL4). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Horizontal.
Dayton
7.75"H-W 4.5"L Aluminum Backdraft Damper: For 8 in Fan, For 8 in Nominal Duct Dia, Single Panel (MPN 3HHL4). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Horizontal.
33.75"H-W 4.5"L Aluminum Backdraft Dampr: For 34 in Fan, For 34 in Nominal Duct Dia, Single Panel (MPN 3HHL9). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Vertical.
Dayton
33.75"H-W 4.5"L Aluminum Backdraft Dampr: For 34 in Fan, For 34 in Nominal Duct Dia, Single Panel (MPN 3HHL9). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Vertical.
47.75"H-W 4.5"L Aluminum Backdraft Dampr: For 48 in Fan, For 48 in Nominal Duct Dia, Single Panel (MPN 3HHN3). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Horizontal.
Dayton
47.75"H-W 4.5"L Aluminum Backdraft Dampr: For 48 in Fan, For 48 in Nominal Duct Dia, Single Panel (MPN 3HHN3). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Horizontal.
19.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 20 in Fan, For 20 in Nominal Duct Dia, Single Panel (MPN 3HHL6). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Vertical.
Dayton
19.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 20 in Fan, For 20 in Nominal Duct Dia, Single Panel (MPN 3HHL6). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Vertical.
41.75"H-W 4.5"L Aluminum Backdraft Dampr: For 42 in Fan, For 42 in Nominal Duct Dia, Single Panel (MPN 6WRK7). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Vertical.
Dayton
41.75"H-W 4.5"L Aluminum Backdraft Dampr: For 42 in Fan, For 42 in Nominal Duct Dia, Single Panel (MPN 6WRK7). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Vertical.
39.75"H-W 4.5"L Aluminum Backdraft Dampr: For 40 in Fan, For 40 in Nominal Duct Dia, Single Panel (MPN 3HHN2). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Horizontal.
Dayton
39.75"H-W 4.5"L Aluminum Backdraft Dampr: For 40 in Fan, For 40 in Nominal Duct Dia, Single Panel (MPN 3HHN2). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Horizontal.
23.75"H-W 4.5"L Alu Univ Backdraft Dampr: For 24 in Fan, For 24 in Nominal Duct Dia, Single Panel (MPN 2FTV7). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Horizontal.
Dayton
23.75"H-W 4.5"L Alu Univ Backdraft Dampr: For 24 in Fan, For 24 in Nominal Duct Dia, Single Panel (MPN 2FTV7). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Horizontal.
61.75"H-W 4.5"L Aluminum Backdraft Dampr: For 60 in Fan, For 62 in Nominal Duct Dia, Double Panel (MPN 6WRK9). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Horizontal.
Dayton
61.75"H-W 4.5"L Aluminum Backdraft Dampr: For 60 in Fan, For 62 in Nominal Duct Dia, Double Panel (MPN 6WRK9). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2000 fpm; Mounting Position: Horizontal.