advantage:high resistant to corrosion,long life and high tensile,easy installation,no nosie,no energy cost.

1, curved blades is scientifically the best results of the calculation can be strictly guaranteed state will never let rainwater intrusion. Ventilation, high efficiency, as long as not less than 0.2 meters in the breeze, or room with the outdoor temperature differences of more than 0.5 °C, can light operations, and effective operations. 2, the central axis with fine steps, to make the turbine blades under high speed and never deformed, and thus greatly increase the fan's life. 3, angle neck design allows fans likes under in 0-22.5 ramp installation, the installation is very simple, generally within about 30 minutes can be installed.

Roof turbine Ventilators