Negative pressure exhaust fan / vacuum fan  

Negative pressure exhaust fan is used for air exchange between inside and outside house. 

This kind of fan is featured for its strong air delivery, which can make excellent air exchange between inside and outside greenhouse.

                                                                                                                                                                             Negative pressure exhaust fan

Features:

1.The aluminum metal alloy of the high strength hub, adopts aviation aluminum magnesium metal alloy, light weight, high

strength, good tensile.

2.The outline border adopts advanced automatic process, more accuracy, material adopt zinc coat and zinc plate.

3.Shutter adopt special push-pull, open-close device, ensure shutter totally open and close, windproof, rainproof and dustproof

4.Strap adjust automatically, no need manual adjustment during lifetime.

5.Newly punch forming fan blade, reasonable angel and reach the max. air flow, mini. Noise.

6.Double bracing (E style) belt transporter, Europe industry motor standard.

7.Special motor hole wind shield, avoid losing wind to reach the best wind suck effect.

8.Belt type B,thicker and durable ,double life time

9.Safety net easily tears down.

10.Strictly quality test process: noise test, vibration test .concentric performance test, fan blade turning speed test, input air teat and vehicle efficiency test.

Specification:

Negative pressure exhaust fan  

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