Particular design features: Compact, lightweight plastic housing. VARIOFAN models available with external temperature sensor. Optional Vario-Pro: Highly flexible software configuration for the fan ensures an easily customisable solution to meet the individual requirements of your application. Open loop speed control, sensor and alarm signal available on request. General features: Material: housing and impeller made of fibreglass-reinforced PA. Electronic commutation completely integrated. Protected against locking. Connection via single strands AWG 22, TR 64, bared and tin-plated. Air exhaust over bars. Direction of rotation counter-clockwise seen on rotor. Mass: 610 g.