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Dayton Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack - Flammable Vapor Belt-Drive Fans with Drive
DaytonFlammable Vapor Belt-Drive Fans with Drive

Dayton Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack

The Dayton Centrifugal Downblast Roof Exhaust Fan (SKU 3G-OTH-81804) is a flammable vapor belt-drive fan with drive, featuring a 21 1/2 in wheel and 4,261 cfm exhaust airflow. It is unassembled, includes a drive…

SKU 3G-OTH-81804

Brand
Dayton
Item
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack
Category
Flammable Vapor Belt-Drive Fans with Drive
Available to Order
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Technical specs
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Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Dayton
Type
Includes Drive Pack, 4,261 cfm
Wheel
21 1/2 in
Assembly
Unassembled
Base Shape
Square
Drive Package
Includes Drive Package
Motor Enclosure
Totally Enclosed Fan Cooled
Motor Efficiency
Standard-Efficiency Motors
Number of Speeds
1
Mounting Location
Roof
Nameplate Voltage
208-230/460V AC
High-Efficiency Motor
No
Hazardous Location Rating
Class I Groups C & D, Class II Groups E, F & G
Hazardous Location Specification
Class I Group C, Class I Group D, Class II Group E, Class II Group F, Class II Group G
Exhaust Airflow @ 0.000 in SP - Range
2,000 to 4,999 cfm
Exhaust Airflow @ 0.500 in SP - Range
2,000 to 4,999 cfm
For High-Static Pressure Applications
No

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

Product Description

The Dayton Centrifugal Downblast Roof Exhaust Fan (SKU 3G-OTH-81804) is a flammable vapor belt-drive fan with drive, featuring a 21 1/2 in wheel and 4,261 cfm exhaust airflow. It is unassembled, includes a drive package, and operates on 208-230/460V AC with a totally enclosed fan-cooled motor. This fan is rated for hazardous locations: Class I Groups C & D and Class II Groups E, F & G.

Frequently Asked Questions

What is the Dayton centrifugal downblast roof exhaust fan used for?

The Dayton is a flammable vapor belt-drive roof exhaust fan designed for hazardous locations classified as Class I Groups C & D and Class II Groups E, F & G. It is used to ventilate industrial facilities where flammable vapors or combustible dusts may be present, such as chemical plants or grain handling operations.

What are the specifications of the Dayton roof exhaust fan?

The Dayton features a 21 1/2 in wheel, 4,261 cfm airflow, and a totally enclosed fan-cooled motor rated for 208-230/460V AC. It includes a drive package, is unassembled, and has a square base for roof mounting. The fan is rated for hazardous locations: Class I Groups C & D and Class II Groups E, F & G.

Where to buy the Dayton roof exhaust fan worldwide?

3G Electric supplies the Dayton centrifugal downblast roof exhaust fan worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source and deliver this flammable vapor belt-drive fan to any international location.

How to install the Dayton roof exhaust fan?

The Dayton is supplied unassembled and includes a drive package. Installation requires assembling the fan housing, mounting the square base on a roof curb, connecting the totally enclosed fan-cooled motor to 208-230/460V AC power, and ensuring proper belt tension. Follow local electrical codes and the manufacturer's manual for hazardous location wiring.

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 flammable vapor belt-drive fans with drive. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack, 21 1/2 in Wheel, 4,759 cfm
Dayton
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack, 21 1/2 in Wheel, 4,759 cfm
Unassembled belt-drive roof exhaust fan with square base, includes drive package. Wheel diameter 21 1/2 in, airflow 3,680 cfm. Single-speed totally enclosed fan-cooled motor, 230/460V AC, standard efficiency. Rated for hazardous locations: Class I Groups C & D, Class II Groups E, F & G. Suitable for ventilating areas with flammable vapors or combustible dusts
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Unassembled belt-drive roof exhaust fan with square base, includes drive package. Wheel diameter 21 1/2 in, airflow 3,680 cfm. Single-speed totally enclosed fan-cooled motor, 230/460V AC, standard efficiency. Rated for hazardous locations: Class I Groups C & D, Class II Groups E, F & G. Suitable for ventilating areas with flammable vapors or combustible dusts
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack, 30 1/2 in Wheel, 9,719 cfm
Dayton
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack, 30 1/2 in Wheel, 9,719 cfm
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack, 18 1/2 in Wheel, 4,608 cfm
Dayton
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack, 18 1/2 in Wheel, 4,608 cfm
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack, 24 1/2 in Wheel, 5,371 cfm
Dayton
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack, 24 1/2 in Wheel, 5,371 cfm
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack, 21 1/2 in Wheel, 5,340 cfm
Dayton
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Includes Drive Pack, 21 1/2 in Wheel, 5,340 cfm

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