r conditioning , to achieve the same comfort home while save energy effectively.4.?? Ventilation , drying dehumidification; with exhaust equipment achieve environmental smoke 5.?? Winter heating , you can run at low speed , make full use of big buildings top waste heat , energy saving.?Specification - industrial home ceiling fansDetails of industrial home ceiling fansGermany impor NORD SK32F-VL90L/4 coaxial helical gear reducerFans Hub：American AA7075 super-hard aluminumalloy, high pressur