... galvanized steel sheet for Fan Box with 140g Zinc, anti-corrosionfor ten year. 3. multi-protection energy saving motor protect against open ... steel sheet ,enamel-insulated wire of international standard,perfect electromagnetic design, IP55 and E class make motor save 10% energy 4 ... per month 3.huge air volume,low noise,good energy saving,little fault4.Reduce air temperature to less than 30,keep ...