The HR and VR roof fans can handle volume flow rates up to 5 m³/s and static pressure up to 1180Pa.
The HR fans can discharge horizontally while the VR fans discharges vertically. The fan cowl is made of seawater resistant aluminum for fan sizes up to 500mm and from 560mm onwards they are made of galvanized sheet steel. The centrifugal impeller is made of polyamide material for fan sizes up to 560mm and above that they are made of aluminum.
The roof fans can be connected with a range of accessories like manual shutters, swing-out frames, flat and sloping roof sockets, etc. This allows the fans to be fitted on either flat roofs or sloping roofs depending on the various applications they are suitable for.
The HR and VR AC fans should be used with a speed controller to meet the demand ventilation needs. The VR EC versions are equipped with high efficiency EC motors and can be controlled by a 0-10 V signal potentiometer.