Ventilation fan is used together with cooling pad to cool down the temperature of greenhouse, livestock and large working room.

This machine consists of  wind leaves, electric machine, fan frame, protecting screening, carriage, louvered window, electric machine drives the wind blander to cause air flow, louvered window can be equipped according to the demand of the client, it can automatically open and shut, to prevent dust from entering ,also can prevent the effects of rain or snow and the backward wind .