Particular design features: Energy-efficient AC voltage fan with EC technology. Converter electronics and fan electronics fully integrated. Significantly reduced power consumption compared to conventional AC voltage fans. Significantly quieter than existing AC voltage fans. Significantly longer service life than existing AC voltage fans. Fan speed independent of the power frequency. General features: Material: fibreglass-reinforced plastic. Impeller PA, housing PBT. Electronic locked-rotor protection. Connection via flat plugs 2.8 x 0.5, optionally with strands that are brought out. Air exhaust over bars. Rotational direction clockwise looking at rotor. Mass: 250 g.