This product can be called wind-driven exhaust fan,roof turbo fan,roof turbo blower,SUS wind-driven fan,no power fan,non-power
fan,non-power ventilator,wind-driven roof exhaust fan,wind fan,roof turbo ventilation fan,wind-driven turbine,non-power turbo fan
and so on.
Turbine ventilators use the heat convection of air caused by natural wind force and indoor and outdoor temperature difference to
push the turbine to rotate so as to use centrifugal force and negative pressure effect to expel the indoor unfresh hot air.