1. The motor is “Haier” specially –devised with remarkable performance , it has been tested for 36 hours by Haier laboratory . 2. It has been equipped with advanced whole whole air reduced device ,internally advanced device ,internationally advanced power-saving technology and automatically heat protect system . 3. The light weight aluminum punch fan blades with large angle , large wind output and low noise . 4. Its parts are punched with thin steel board of high quality , good performance , light weight ,elegant appearance ,and easy to install . 5. The motor adopts punch out crust and bearing roll with low noise ,long life . 6. CAD optimized devised wind output ; 840-8700m³/hour 7. The outer size has hauling and vertical canister ,and outer frame can be stainless steel or steel spraying ,it can easily satisfy the requirements of the different customers .