Roof Fan - RDA 31-3540-EC

 with swirl free vertically directed discharge for gas medium up to app. +40 °C. Stylish sealed casing manufactured from aluminium, Base frame of galvanised sheet steel for fitting to upstand, projecting well beyond the upstand in order to increase weatherproofing. Flange connection at intake acc. to DIN 24155-2 Discharge outlets are protected from the weather on fan shutdown by automatic backdraught shutters. Casing parts, and the impeller plus motor, are easily removed for inspection and maintenance. High performance centrifugal impeller with backward curved blades, mounted on the rotor of a variable speed external EC-motor, protected to IP 44, totally maintenance free. Installed with isolator fitted ready to connect. Performance data in according DIN 24166  tolerance class 2 (BS 848 Class "B"). Meets the efficiency requirements of Regulation EU1253/2014 for ventilation units.