Particular design features: Very smooth running 3-phase fan drive. Very high pressure build-up. Backward curved impeller. Standard with PWM control input and speed signal. Other inputs and outputs on request. General features: Impeller made of sheet steel, galvanised. Electronic commutation completely integrated. Direction of rotation: clockwise, seen on rotor. Direction of air flow: axial air intake, centrifugal air exhaust. Connection via single strands AWG 20, TR 64, speed signal and control input AWG 22, bared and tin-plated. Mass: 930 g