The High Volume Roof Exhaust Fan is a roof-mounted ventilation fan designed for large-span buildings requiring high-capacity air exhaust. It is available in centrifugal and propeller configurations for different airflow and static-pressure requirements.
Key Specifications
|
Parameter |
Specification |
|
Airflow Capacity |
3,000–55,000 CFM / 5,000–93,000 m³/h |
|
Static Pressure |
Up to 750 Pa / 3.0 in. wg |
|
Impeller Diameter |
450–1,400 mm |
|
Motor Power |
0.55–30 kW / 0.75–40 HP |
|
Electrical |
380–480 V, 3 Phase, 50/60 Hz |
|
Operating Temperature |
-20°C to +60°C |
|
Housing |
1.5–3.0 mm Galvanized Steel / Aluminum |
|
Fan Type |
Centrifugal / Propeller, model dependent |
|
Drive |
Direct Drive / Belt Drive |
|
Installation |
Roof Mounted |
Fan Construction & Drive
Fan Wheel: Centrifugal or propeller configuration selected according to the required airflow and static pressure.
Drive: Direct-drive and belt-drive arrangements cover different fan sizes and operating requirements.
Shaft & Bearings: Belt-drive models use a separate shaft and bearing assembly for service access.
Transmission: Belts and pulleys can be inspected or replaced without replacing the complete fan assembly.
Product Features
High Airflow
Large-diameter fan assemblies up to 1,400 mm and motors up to 30 kW provide airflow up to 55,000 CFM for high-volume exhaust duties.
Low Vibration
The rotating assembly is dynamically balanced before operation to reduce imbalance-related vibration and support smoother running.
Easy Servicing
Belt-drive models provide access to belts, pulleys and bearings for inspection and replacement, simplifying routine maintenance.
Roof Compatibility
The fan can be checked against existing or proposed roof systems using:
Roof Opening: Length × width of the roof opening.
Curb: Length × width × height.
Fan Base: Base dimensions and mounting-hole spacing.
Roof Pitch: Roof slope for curb matching.
Replacement Data: Existing fan model, nameplate and installation dimensions.
Power Supply: Voltage, phase and frequency.
GA or installation drawings can be checked against these dimensions before production to confirm fitment.
Applications
Warehouses & Distribution Centers: Heat and stale-air exhaust across large storage areas.
Manufacturing Plants: Removal of process heat, fumes and airborne contaminants.
Production Workshops: High-volume exhaust for open production spaces.
Commercial Buildings: Rooftop mechanical exhaust for large enclosed areas.
Agricultural Buildings: High-volume ventilation for heat and moisture removal.
Customization
|
Item |
Available Options |
|
Air Performance |
Specified airflow and static pressure |
|
Fan Base |
Non-standard base dimensions |
|
Motor |
Power, voltage, phase and frequency |
|
Drive |
Direct drive or belt drive |
|
Housing |
Galvanized steel / Aluminum / Specified material |
|
Roof Curb |
Dimensions and height |
|
Controls |
VFD or specified control interface |
|
Protection |
Bird screen, guard or weather protection |
|
Identification |
Private-label nameplate and packaging |
Why Choose Qiyue Fan
10,500 m² Manufacturing Facility
Qiyue operates a 10,500 m² manufacturing facility for industrial fan production.
70+ Industrial Fan Series
Qiyue offers more than 70 industrial fan series covering different industrial ventilation and exhaust requirements.
700+ Configurations
More than 700 configurations provide different combinations of fan structure, drive, materials and operating requirements.
ISO-Certified Management Systems
Qiyue operates under ISO 9001, ISO 14001 and ISO 45001 management systems covering quality, environmental and occupational health and safety management.
Accessories & Maintenance
Backdraft Damper: Gravity or motorized type to limit reverse airflow during shutdown.
Bird Screen: Helps prevent birds and debris from entering the exhaust opening.
Safety Guard: Protective guard for specified installation conditions.
Roof Curb: Curb assembly matched to the fan base and roof opening.
Maintenance Parts: Belts, pulleys and bearings are available for belt-drive models.
Supply Information
|
Item |
Supply Information |
|
MOQ |
1 Set |
|
Standard Lead Time |
15–20 Working Days |
|
Custom Lead Time |
25–35 Working Days |
|
Sample |
1 Set |
|
Packaging |
Export Carton / Plywood Case |
|
OEM |
Nameplate, Label & Packaging |
|
Spare Parts |
Motor, Belt, Pulley, Bearing, Damper, Screen |
FAQ
Q: What should be included in a roof exhaust fan quotation?
A: A commercial quotation should include the fan model, airflow, static pressure, motor data, electrical configuration, accessories, quantity, packaging and delivery terms.
Q: What documents are normally required for commercial roof fan projects?
A: Common project documents include a product datasheet, performance data, GA drawing, motor datasheet, wiring diagram and installation instructions.
Q: Can roof exhaust fans be supplied for distributor orders?
A: Yes. Distributor orders can be supplied with private-label nameplates, product labels and packaging according to the confirmed OEM requirements.
Q: What information should I provide when requesting a roof exhaust fan quotation?
A: Provide the required airflow, static pressure, electrical supply, quantity, installation location and any project documentation requirements.
Q: How should roof exhaust fans be compared between suppliers?
A: Compare the stated airflow and static pressure together with motor data, fan construction, drive arrangement, supplied documentation and inspection requirements.
Q: What should be checked before approving a roof exhaust fan order?
A: Check the approved model, performance point, motor specification, electrical data, accessories, drawings and commercial order details before production.
Q: Can the fan be supplied with project documentation?
A: Yes. Product and installation documentation can be prepared according to the confirmed project requirements, including drawings, performance information and electrical documents.
Q: How should a replacement roof exhaust fan be specified?
A: Provide the existing fan model or nameplate together with the original installation dimensions and available project documentation for matching.
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