Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

Dayton 33"H-W 5 1/4"L SS Backdraft Dampr: For 30 in Fan, Double Panel, 33 in H - Wall-Mount Backdraft Dampers
DaytonWall-Mount Backdraft Dampers

Dayton 33"H-W 5 1/4"L SS Backdraft Dampr: For 30 in Fan, Double Panel, 33 in H

The Dayton 33"H-W 5 1/4"L SS Backdraft Damper (SKU 3G-OTH-77214) is a wall-mount backdraft damper with flat blades, designed for horizontal airflow and vertical mounting. It has a maximum air velocity of 2500 fpm and…

SKU 3G-OTH-77214

Brand
Dayton
Item
33"H-W 5 1/4"L SS Backdraft Dampr: For 30 in Fan, Double Panel, 33 in H
Category
Wall-Mount Backdraft Dampers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
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

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Dayton
Type
Double Panel, 33 in W, Horizontal
D
2 in
H
33 in
Blade Type
Flat Blade
Airflow Direction
Horizontal
Mounting Position
Vertical
Maximum Air Velocity
2500 fpm

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 33"H-W 5 1/4"L SS Backdraft Damper (SKU 3G-OTH-77214) is a wall-mount backdraft damper with flat blades, designed for horizontal airflow and vertical mounting. It has a maximum air velocity of 2500 fpm and is intended for use with a 30-inch fan.

Frequently Asked Questions

What is the Dayton 33"H-W 5 1/4"L SS Backdraft Damper used for?

This Dayton backdraft damper is used to prevent reverse airflow in ventilation systems. It is designed for horizontal airflow and vertical mounting, typically installed with a 30-inch fan to allow exhaust flow in one direction while blocking backdrafts.

What are the specifications of the Dayton backdraft damper?

The Dayton backdraft damper has flat blades, a maximum air velocity of 2500 fpm, and dimensions of 33 inches high by 33 inches wide by 2 inches deep. It is designed for horizontal airflow and vertical mounting, with a 5 1/4-inch blade length.

Where to buy the Dayton backdraft damper worldwide?

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

How to install the Dayton backdraft damper?

Install the Dayton damper in a vertical mounting position with the airflow direction set horizontally. Ensure the damper is securely fastened to the wall or duct opening. Follow standard HVAC practices for sealing and alignment to prevent air 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 wall-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

Compatible alternatives & equivalents

Cross-referenced by specification & description
23"H-W 5 1/4"L SS Backdraft Dampr: For 20 in Fan, Single Panel, 23 in H, 23 in W, 2 in D, Horizontal
Dayton
23"H-W 5 1/4"L SS Backdraft Dampr: For 20 in Fan, Single Panel, 23 in H, 23 in W, 2 in D, Horizontal
27"H-W 5 1/4"L SS Backdraft Dampr: For 24 in Fan, Double Panel, 27 in H, 27 in W, 2 in D, Horizontal
Dayton
27"H-W 5 1/4"L SS Backdraft Dampr: For 24 in Fan, Double Panel, 27 in H, 27 in W, 2 in D, Horizontal
This wall-mount backdraft damper features a double-panel flat blade design with horizontal airflow and vertical mounting. It measures 39 inches high, 39 inches wide, and 2 inches deep, supporting a maximum air velocity of 2500 fpm. Suitable for preventing reverse airflow in ventilation systems
Dayton
This wall-mount backdraft damper features a double-panel flat blade design with horizontal airflow and vertical mounting. It measures 39 inches high, 39 inches wide, and 2 inches deep, supporting a maximum air velocity of 2500 fpm. Suitable for preventing reverse airflow in ventilation systems
19"H-W 5 1/4"L SS Backdraft Dampr: For 16 in Fan, Single Panel, 19 in H, 19 in W, 2 in D, Horizontal
Dayton
19"H-W 5 1/4"L SS Backdraft Dampr: For 16 in Fan, Single Panel, 19 in H, 19 in W, 2 in D, Horizontal
13"H-W 5 1/4"L SS Backdraft Dampr: For 10 in Fan, Single Panel, 13 in H, 13 in W, 2 in D, Horizontal
Dayton
13"H-W 5 1/4"L SS Backdraft Dampr: For 10 in Fan, Single Panel, 13 in H, 13 in W, 2 in D, Horizontal
21"H-W 5 1/4"L SS Backdraft Dampr: For 18 in Fan, Single Panel, 21 in H, 21 in W, 2 in D, Horizontal
Dayton
21"H-W 5 1/4"L SS Backdraft Dampr: For 18 in Fan, Single Panel, 21 in H, 21 in W, 2 in D, Horizontal

More from Dayton

View all Dayton parts
This single-panel backdraft damper with flat blades is designed for vertical mounting in wall openings. It allows horizontal airflow in one direction while preventing reverse flow, suitable for exhaust systems in commercial or industrial ventilation. Maximum air velocity is 2500 fpm
Dayton
This single-panel backdraft damper with flat blades is designed for vertical mounting in wall openings. It allows horizontal airflow in one direction while preventing reverse flow, suitable for exhaust systems in commercial or industrial ventilation. Maximum air velocity is 2500 fpm
This wall-mount backdraft damper is designed for horizontal airflow and vertical mounting. It features a flat blade type and a fiberglass rear flange. Dimensions: 21 in height, 21 in width, 3 3/8 in depth. Suitable for use with an 18-inch fan to prevent reverse airflow in ventilation systems
Dayton
This wall-mount backdraft damper is designed for horizontal airflow and vertical mounting. It features a flat blade type and a fiberglass rear flange. Dimensions: 21 in height, 21 in width, 3 3/8 in depth. Suitable for use with an 18-inch fan to prevent reverse airflow in ventilation systems
This wall-mount backdraft damper features flat aluminum blades and is designed for horizontal airflow in a vertical mounting position. With a height of 54 inches, width of 54 inches, and depth of 2 1/4 inches, it supports a maximum air velocity of 2500 fpm. Suitable for use in exhaust systems to prevent reverse airflow when the fan is off
Dayton
This wall-mount backdraft damper features flat aluminum blades and is designed for horizontal airflow in a vertical mounting position. With a height of 54 inches, width of 54 inches, and depth of 2 1/4 inches, it supports a maximum air velocity of 2500 fpm. Suitable for use in exhaust systems to prevent reverse airflow when the fan is off
This wall-mount backdraft damper features a single-panel flat blade design for horizontal airflow. It mounts vertically and is rated for a maximum air velocity of 2000 fpm. Suitable for use in exhaust or intake systems to prevent reverse airflow when the fan is not operating
Dayton
This wall-mount backdraft damper features a single-panel flat blade design for horizontal airflow. It mounts vertically and is rated for a maximum air velocity of 2000 fpm. Suitable for use in exhaust or intake systems to prevent reverse airflow when the fan is not operating
This wall-mount backdraft damper is designed for vertical installation in wall openings to allow horizontal exhaust airflow while preventing reverse airflow when the fan is off. It features double-panel construction with flat aluminum blades and a maximum air velocity of 2500 fpm
Dayton
This wall-mount backdraft damper is designed for vertical installation in wall openings to allow horizontal exhaust airflow while preventing reverse airflow when the fan is off. It features double-panel construction with flat aluminum blades and a maximum air velocity of 2500 fpm
This wall-mount backdraft damper is designed for vertical mounting in exhaust or intake systems to prevent reverse airflow when the fan is off. It features a single-panel, flat blade construction with vertical airflow direction. Suitable for use with a 12-inch fan, it handles a maximum air velocity of 2250 fpm
Dayton
This wall-mount backdraft damper is designed for vertical mounting in exhaust or intake systems to prevent reverse airflow when the fan is off. It features a single-panel, flat blade construction with vertical airflow direction. Suitable for use with a 12-inch fan, it handles a maximum air velocity of 2250 fpm
Single panel wall-mount backdraft damper with flat blades. Designed for horizontal airflow in vertical mounting position. Dimensions: 39 in height, 39 in width, 2 1/2 in depth. Maximum air velocity: 2500 fpm. Used to prevent reverse airflow in ventilation systems
Dayton
Single panel wall-mount backdraft damper with flat blades. Designed for horizontal airflow in vertical mounting position. Dimensions: 39 in height, 39 in width, 2 1/2 in depth. Maximum air velocity: 2500 fpm. Used to prevent reverse airflow in ventilation systems
This wall-mount backdraft damper features a single-panel, flat blade design for vertical mounting. It allows vertical airflow in one direction and closes automatically when airflow stops, preventing reverse flow. Constructed with aluminum blades, it is suitable for use in ventilation systems where backdraft prevention is required. Maximum air velocity is 2250 fpm
Dayton
This wall-mount backdraft damper features a single-panel, flat blade design for vertical mounting. It allows vertical airflow in one direction and closes automatically when airflow stops, preventing reverse flow. Constructed with aluminum blades, it is suitable for use in ventilation systems where backdraft prevention is required. Maximum air velocity is 2250 fpm