We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

Dayton Axial Downblast Roof Exhaust Fans: Less Drive Pack, 36 in Blade - Clean Air Belt-Drive Fans without Drive
DaytonClean Air Belt-Drive Fans without Drive

Dayton Axial Downblast Roof Exhaust Fans: Less Drive Pack, 36 in Blade

The Dayton Axial Downblast Roof Exhaust Fan (Less Drive Pack, MPN 4YU91) is an unassembled clean air belt-drive fan for industrial and commercial applications. It features a 36-inch blade, a square base, and is…

SKU 3G-OTH-80439

Brand
Dayton
Item
Axial Downblast Roof Exhaust Fans: Less Drive Pack, 36 in Blade
Category
Clean Air Belt-Drive Fans without Drive
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
4YU91
Type
For 2,580 cfm to 10,406 cfm Airflow
Blade
36 in
Assembly
Unassembled
Base Shape
Square
Application
Industrial and Commercial Applications
For Air Type
Clean Air
Drive Package
Less Drive Package
Mounting Location
Roof
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 Axial Downblast Roof Exhaust Fan (Less Drive Pack, MPN 4YU91) is an unassembled clean air belt-drive fan for industrial and commercial applications. It features a 36-inch blade, a square base, and is designed for roof mounting with airflow from 2,580 cfm to 10,406 cfm. This less drive package requires separate drive components for operation.

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 Axial Downblast Roof Exhaust Fan (4YU91) used for?

The Dayton Axial Downblast Roof Exhaust Fan (4YU91) is used for industrial and commercial clean air ventilation. It is roof-mounted to exhaust stale air, heat, or fumes from factories, warehouses, and commercial buildings, providing airflow from 2,580 cfm to 10,406 cfm.

What are the specifications of the Dayton 4YU91 exhaust fan?

The Dayton 4YU91 is an unassembled clean air belt-drive fan with a 36-inch blade and square base. It is designed for roof mounting and handles airflow from 2,580 cfm to 10,406 cfm. This less drive package requires separate drive components for operation.

Where to buy the Dayton 4YU91 roof exhaust fan worldwide?

You can source the Dayton 4YU91 roof exhaust fan through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide locations. Contact us for availability and lead time.

How to install the Dayton 4YU91 less drive pack fan?

Install the Dayton 4YU91 by mounting the square base on a roof curb, ensuring proper sealing. Since it is a less drive package, you must separately source and install a motor, belt, and pulley system. Follow standard belt-drive fan alignment and tensioning practices for safe 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 clean air belt-drive fans without drive. 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
Axial Downblast Roof Exhaust Fans: Less Drive Pack, 30 in Blade, For 1,912 cfm to 8,056 cfm Airflow (MPN 4YU90). Key specifications — Application: Industrial and Commercial Applications; Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For Air Type: Clean Air; Mounting Location: Roof; Drive Package: Less Drive Package.
Dayton
Axial Downblast Roof Exhaust Fans: Less Drive Pack, 30 in Blade, For 1,912 cfm to 8,056 cfm Airflow (MPN 4YU90). Key specifications — Application: Industrial and Commercial Applications; Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For Air Type: Clean Air; Mounting Location: Roof; Drive Package: Less Drive Package.
Axial Downblast Roof Exhaust Fans: Less Drive Pack, 24 in Blade, For 1,352 cfm to 5,320 cfm Airflow (MPN 4YU89). Key specifications — Application: Industrial and Commercial Applications; Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For Air Type: Clean Air; Mounting Location: Roof; Drive Package: Less Drive Package.
Dayton
Axial Downblast Roof Exhaust Fans: Less Drive Pack, 24 in Blade, For 1,352 cfm to 5,320 cfm Airflow (MPN 4YU89). Key specifications — Application: Industrial and Commercial Applications; Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For Air Type: Clean Air; Mounting Location: Roof; Drive Package: Less Drive Package.
Axial Downblast Roof Exhaust Fans: Less Drive Pack, 20 in Blade, For 960 cfm to 3,957 cfm Airflow (MPN 4YU88). Key specifications — Application: Industrial and Commercial Applications; Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For Air Type: Clean Air; Mounting Location: Roof; Drive Package: Less Drive Package.
Dayton
Axial Downblast Roof Exhaust Fans: Less Drive Pack, 20 in Blade, For 960 cfm to 3,957 cfm Airflow (MPN 4YU88). Key specifications — Application: Industrial and Commercial Applications; Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For Air Type: Clean Air; Mounting Location: Roof; Drive Package: Less Drive Package.
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Less Drive Pack, 11 in Wheel, Clean Air (MPN 4YU92). Key specifications — Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For High-Static Pressure Applications: No; Mounting Location: Roof; Number of Speeds: 1; Drive Package: Less Drive Package.
Dayton
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Less Drive Pack, 11 in Wheel, Clean Air (MPN 4YU92). Key specifications — Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For High-Static Pressure Applications: No; Mounting Location: Roof; Number of Speeds: 1; Drive Package: Less Drive Package.
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Less Drive Pack, 13 1/4 in Wheel, Clean Air (MPN 4YU94). Key specifications — Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For High-Static Pressure Applications: No; Mounting Location: Roof; Number of Speeds: 1; Drive Package: Less Drive Package.
Dayton
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Less Drive Pack, 13 1/4 in Wheel, Clean Air (MPN 4YU94). Key specifications — Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For High-Static Pressure Applications: No; Mounting Location: Roof; Number of Speeds: 1; Drive Package: Less Drive Package.
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Less Drive Pack, 16 3/4 in Wheel, Clean Air (MPN 4YU96). Key specifications — Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For High-Static Pressure Applications: No; Mounting Location: Roof; Number of Speeds: 1; Drive Package: Less Drive Package.
Dayton
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Less Drive Pack, 16 3/4 in Wheel, Clean Air (MPN 4YU96). Key specifications — Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For High-Static Pressure Applications: No; Mounting Location: Roof; Number of Speeds: 1; Drive Package: Less Drive Package.

More from Dayton

View all Dayton parts
Axial Upblast Roof Exhaust Fan: Belt Drive, 48 in Blade, For 14,614 cfm to 37,987 cfm Airflow (MPN 4YY27). Key specifications — Brand: DAYTON.
Dayton
Axial Upblast Roof Exhaust Fan: Belt Drive, 48 in Blade, For 14,614 cfm to 37,987 cfm Airflow (MPN 4YY27). Key specifications — Brand: DAYTON.
Axial Upblast Roof Exhaust Fan: Belt Drive, 60 in Blade, For 36,740 cfm to 64,326 cfm Airflow (MPN 4YY29). Key specifications — Brand: DAYTON.
Dayton
Axial Upblast Roof Exhaust Fan: Belt Drive, 60 in Blade, For 36,740 cfm to 64,326 cfm Airflow (MPN 4YY29). Key specifications — Brand: DAYTON.
Axial Upblast Roof Exhaust Fan: Belt Drive, 24 in Blade, For 4,912 cfm to 7,766 cfm Airflow (MPN 4YY23). Key specifications — Brand: DAYTON.
Dayton
Axial Upblast Roof Exhaust Fan: Belt Drive, 24 in Blade, For 4,912 cfm to 7,766 cfm Airflow (MPN 4YY23). Key specifications — Brand: DAYTON.
Axial Upblast Roof Exhaust Fan: Belt Drive, 54 in Blade, For 17,378 cfm to 50,958 cfm Airflow (MPN 4YY28). Key specifications — Brand: DAYTON.
Dayton
Axial Upblast Roof Exhaust Fan: Belt Drive, 54 in Blade, For 17,378 cfm to 50,958 cfm Airflow (MPN 4YY28). Key specifications — Brand: DAYTON.
Axial Upblast Roof Exhaust Fan: Belt Drive, 42 in Blade, For 11,471 cfm to 32,495 cfm Airflow (MPN 4YY26). Key specifications — Brand: DAYTON.
Dayton
Axial Upblast Roof Exhaust Fan: Belt Drive, 42 in Blade, For 11,471 cfm to 32,495 cfm Airflow (MPN 4YY26). Key specifications — Brand: DAYTON.
Axial Upblast Roof Exhaust Fan: Belt Drive, 30 in Blade, For 7,845 cfm to 15,408 cfm Airflow (MPN 4YY24). Key specifications — Brand: DAYTON.
Dayton
Axial Upblast Roof Exhaust Fan: Belt Drive, 30 in Blade, For 7,845 cfm to 15,408 cfm Airflow (MPN 4YY24). Key specifications — Brand: DAYTON.
Axial Upblast Roof Exhaust Fan: Belt Drive, 36 in Blade, For 11,600 cfm to 19,212 cfm Airflow (MPN 4YY25). Key specifications — Brand: DAYTON.
Dayton
Axial Upblast Roof Exhaust Fan: Belt Drive, 36 in Blade, For 11,600 cfm to 19,212 cfm Airflow (MPN 4YY25). Key specifications — Brand: DAYTON.
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Less Drive Pack, 21 1/2 in Wheel, Clean Air (MPN 4YU98). Key specifications — Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For High-Static Pressure Applications: No; Mounting Location: Roof; Number of Speeds: 1; Drive Package: Less Drive Package.
Dayton
Centrifugal Downblast Roof Exhaust Fan: Belt Drive, Less Drive Pack, 21 1/2 in Wheel, Clean Air (MPN 4YU98). Key specifications — Assembly: Unassembled; Base Shape: Square; Brand: DAYTON; For High-Static Pressure Applications: No; Mounting Location: Roof; Number of Speeds: 1; Drive Package: Less Drive Package.