... :100Pa-50,000Pa Ventilator,centrifugal ventilatorIntroduction of centrifugal ventilator,centrifugal fan,fan,ventilator, blower,air blower,exhaust fan,ventilation fanFRP is a ... look, we call dextrorotation ventilator that impeller rotate in clockwise direction;on the controry we call it levoduction ... by the road , every part must be through checking in detail , Can installation, place of installing, it ...