greenhouse circulation fan

1.adopt "haier " tri-proof moror,rotate steadily and long lifetime. 2.international standard energy saving technique, and thermal protection system. 3.pass the haier lab360 hours destructive test. 4.aluminum punching fan blade, big wind capacity and low noise. 5.the shell adopts the hole current collector design. 6. the shell can be selected by stainless steel and plastic steel 7.working time is above 10 years 8.the hanging fastening is very convenience for installation. with it the fan can adjust freely