External wall fan AV 150, with 2 performance levels 750/545 m/h volume flow. Suitable for external wall mounting for ventilation of small and medium-sized rooms of all types, in residential, commercial and industrial areas. Weatherproof housing in compact design, made of galvanized sheet steel, powder-coated, alpine white. Connection piece according to standard pipe diameter, solid base plate made of plastic also enables installation on uneven surfaces. Bird protection grille on the outlet side and 2 locking slats with spring return. Impeller: Energy-saving radial impeller with backwards curved blades made of high-quality plastic. Dynamically balanced for quiet operation. Drive: Maintenance-free, closed, ball-bearing motor with moisture protection and thermal overload protection in the winding. Power control: by means of external operating switch MVB (Art. No.: 6091), continuously variable by means of electronic speed controller ESU1/ESA1 (Art. No.: 0236/0238) or transformer speed controller TSW 1.5 (Art. No.: 1495). Electrical connection: flush-mounted from the rear or surface-mounted from the side.