The R2E280-AE52-05 is a centrifugal fan featuring backward curved blades are an ideal solution to a wide range of application requirements and are ideally suited for intake suction use. Additionally, ebm-papst centrifugal fan, specifically those used for intake suction using backward curved blades, do not require a scroll housing – increasing ease of use and versatility. Supply Voltage 230 V ac Operating Temperature -13 ~ 104°F (-25 ~ 40°C) Blower Type Centrifugal AC Operation Air Flow 2110m³/h Series R2E280 Width 280mm Depth 125mm Dimensions 280 (Dia.) x 125 Dmm Fan Speed 2700rpm Noise Level 76dB(A) Bearing Type Ball Direction of Curve Backward