Systemair DVSI 310EV - Centrifugal roof fan, <125W, vertical discharge, insulated

Speed-controllable Integral thermal contacts Low sound level Maintenance-free and reliable The DVS/DHS/DVSI models have impellers with backward curved blades and external rotor motors. All motors are speed controllable over the voltage. For speed controlling of the DVS/DHS/DVSI roof fans with a frequency converter a type with all pole sine filter is needed! The motors are suspended on effective vibration dampers. DVS/DHS/DVSI …EZ / EV / ES: 1~ motor with connection for 2-speeds DVS/DHS/DVSI …E4: 1-speed motor DVS/DHS/DVSI …DV / DS: 3~ with Y/D-connection for 2-speeds To protect the motors from overheating the DVS/DHS/DVSI up to size 190/225 have integral thermal contacts, from size 311 with external leads for connection to a motor protection device. The casing is made from aluminum and the base frame from galvanised steel. Suitable for coastal applications. DVS with outlet vertical DHS with outlet horizontal DVSI with 50 mm mineral wool insulation for low noise level.