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 fibreglass-reinforced plastic. 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 22, TR 64, bared and tin-plated. Mass: 890 g