ventilation fan

Features: 1) Provides enormous amount of axial air flow 2) Low noise, high energy efficiency Supply the best air-disposal approach for the building. The design is ahead of times. Three frames -:galvanized steel plate, fiberglass and static powder coat steel plate,equipped with three six blades.The moror can be dual-voltage,dual-frequency or single-voltage(110v/230v,50/60HZ,220/380v，).Customer can make choice based upon own demand. Axial flow low noise, economize on energy, low consume.Shutter close automatically when the fan is shut off to prevent dust,sundries,rain and dew,and cold air entering into the room. The fan can be used for workshop,birdhouse and greenhouse,etc.