Our direct drive industrial exhaust fan is capable of generating an astonishing pressure differential, which results in effects that not everyone can achieve.
Even without any sealed isolation between the two fans, the negative pressure generated by the front fan can still draw in a large amount of air, driving the rotation of the rear fan's propeller.
If you are considering purchasing professional ventilation equipment, it is essential to see and test it in person and compare it, rather than solely relying on attractive packaging and abstract advertising.

You may not know that over time. the tension of the belt in a metalhousing beltdriven negative pressure exhaust fan gradually loosens and breaks, causing the motor hole on the panel ( also known as a guide hood ) to produce a continuous shortcycling phenomenon during exhaust, which is also known as backflow. These two issues together cause the exhaust volume to not maintain a certain level and gradually reduce efficiency.

If you stand outside the fan guard near the motor hole, you can clearly feel the wind being continuously sucked in. This means that the exhaust fan is producing backflow during exhaust, which, for industrial exhaust fans, means that the efficiency is not good.

In contrast, our aluminum alloy eight blade directdrive negative pressure exhaust fan does not require a belt and has no motor hole on the panel ( completely eliminating backflow ). This type of exhaust volume, is equipped with a PMSM motor that is very energyefficient, and can be infinitely adjusted. It is a truly costsaving and excellent ventilation device with excellent results.

Model : EW54DC8AD
Housing size : 138 x 138 x 45 cm ( 54inch )
Propeller Diameter : 50inch
Motor power : 1.5HP Permanentmagnet motor ( singlephase or threephase can be used )
RPM High : 400 rpm
Voltage : 200~460V
Frequency : 5060Hz

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BEST FAN INC. 風動世界有限公司
Industrial Fans Manufacturer, Supplier, Exporter.
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