greenhouse exhaust fan/ventilator

1.The system opens and closes automatically when the fanworks. 2. Centrifugal shutter system and other fitting of shutter are made of Nylon, high quality engineering plastics, 100% raw material, high strength, and long service life. 3. The inner steel fitting installed in the flange increases the security and avoids the stretching change when Nylon system operates. 4. Adopt the inject tion molded stainless steel blade, no broken, no distortion, aesthetic and durable. 5. Balance running machinerykeepsthe balance of entire fan blades and ensures operating steady, low noise, long service life. 6. Adopt the handle as new inset design from our engineer, easyto carry, transport and install, also hasno affect on the appearance. It is made of high quantity aluminum-magnesium alloy, light weight, high strength. 7. The high efficient and energy-saving motor has passed the national CCC certification, IP55 protection grade, F insulation grade. Model specificationsDiameter blades mmBlades rotational speed rpmMotor rotational speed rpmAir flow m3/helectric currentNoise decibelsImport powerRated voltageOuter size mmhigh×width×thickHYF-10009104381400320001.2≤644003801000×1000×450HYF-138012704371400448002.8≤6511003801380×1380×450