Push -pull Fan

Blades are made of stainless steel through punch forming.AII the blades have been tested and calibrated by advanced computer dynamic balance measure instaiment.dynamic balance been controlled within Ig.make sure running smoothty.small vibration.low noise and high airflow.Adopting centrifugal opening system assure to open and closed the shutter completeiy.when the shutter open make sure the lowest air resistance.highest air volume.The shutter could closed completely, useful resistance to wind and sunshine.

Shutter connection accessories are made of good quality nylon material, long life, easy open.make sure the shutter no deformation.working stable.