The Leader in Factory Cooling & Industrial Ventilation

Roof Exhaust Fans

Roof Exhaust Fans create the Vital Air Change needed to keep your space feeling fresh. Roof Exhaust Fans help direct contaminated and hot air out of the building.

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Roof Exhaust Fans
Roof Exhaust Fan Motor Belt-Driven Centrifugal Design Elegant Design Aluminum Housing

Roof Exhaust Fan’s Features

Aesthetically Pleasing

Elegant profile design makes roof line aesthetically pleasant.

Centrifugal Design

Centrifugal design fan which has higher static pressure allows it to be ducted for reaching out at further distance.

Belt-Driven

Belt-driven design enables fan to run at lower speed and hence low noise level.

Motor Placement

Motor is located outside the air stream. This ensures long service life especially if exhaust air is contaminated with dust and other airborne particles.

Aluminum Housing

Fan wheel and housing is made of aluminum alloy material. Light weight and minimum load on metal roof structure.

The Most Effective Way to Remove Trapped Heat

In our local climate, the metal roof of an industrial steel building can be heated up to 80 ˚C at the middle of the day. The roof then radiates the heat down into the interior of the building which will lead to the formation of stratified hot air within the building. The resultant upper layers of hot air are most effectively removed with roof exhaust fans installed along the roof center line.

Roof Exhaust Fans -The Most Effective Way To Remove Trapped Heat

CFD Simulation & Finite Element Analysis Technology

Our manufacturing partner in China uses computer-aided air movement simulation model to calculate the efficiency pf the fan based on the number of blades, blade angle, with, and sound level. It also analyses and provides accurate prediction of how material is likely to respond when subjected to structural and/ or thermal loads

Sample Projects

Versus

Wall Exhaust Fan

In our local climate, the metal roof of an industrial steel building can be heated up to 80 ˚C at the middle of the day. The roof then radiates the heat down into the interior of the building which will lead to the formation of stratified hot air within the building. 

Centrifugal Roof Fan

The resultant upper layers of hot air are most effectively removed with roof exhaust fans installed along the roof center line.Often wall exhaust fans are installed instead but they will not perform with the same effectiveness as roof exhaust fans. Wall exhaust fans are more for the purpose of creating air change in the building.
Versus

Axial Roof Fan

Electric motor is in the air stream and subject to the hot and maybe contaminated air.
Axial fan blades cause air turbulence and backward flow before air is discharged

Centrifugal Roof Fan

Electric motor is located outside the air stream.
Centrifugal fan blades delivers a smooth downward exit air flow
Versus

Wind Driven Fan

We do not consider Wind Driven Fan is an alternative to our Centrifugal Roof Fan because of the following reason:
Wind Driven Fan depends only on strong wind velocity to work.
Even under strong wind velocity, air flow through the unit is very small (200 m3/h)
When the bearing of the unit ceases up, rain water will go pass the roof.
Wind Driven Fan does work in house attic but fail badly in all industrial buildings

Centrifugal Roof Fan

We do not consider Wind Driven Fan is an alternative to our Centrifugal Roof Fan because of the following reason:
Wind Driven Fan depends only on strong wind velocity to work.
Even under strong wind velocity, air flow through the unit is very small (200 m3/h)
When the bearing of the unit ceases up, rain water will go pass the roof.
Wind Driven Fan does work in house attic but fail badly in all industrial buildings

Dimension & Weight

Models
CRF-575-0.75-GT
CRF-675-1.5-GT
CRF-750-2.2-GT
A (mm)
940
1100
1200
B (mm)
890
995
1000
C (mm)
750
900
900
D (mm)
70
53
53
Weight (kg)
62
84
92

Technical Data & Performance

Models
CRF-575-0.75-GT
CRF-675-1.5-GT
CRF-750-2.2-GT
Air Flow (m3/h)
10,000
15,000
15,000
Static Press (Pa)
50
100
100
Fan Speed (rpm)
781
725
720
Noise Level
Point A
63 dB (A)
65 dB (A)
70 dB (A)
Motor (kW)
0.75
1.50
2.20
Ph/Voltage
3Ph/380V
3Ph/380V
3Ph/380V

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