1.greenhouse axial fan, low noise 2.high flow rates 3.shutter 4.energy-saving,nice-looking appearance 5.convenient JS Series greenhouse Axial Fan is a new developed product. It has features as low noise, high flow rates, long wind distance, energy-saving,housing and outlet shutter are made of galvanized steel or Stainless steel, impellers are made of aluminum alloy,not easy to rust,nice-looking ...