• Casing, filter cover, sides, grille and base moulded from impact-resistant thermoplastic material, colour light grey. • 3 speed motor with thermal overload protection and double extension shaft turning in self-lubricating bushings, coupled to 2 impellers made of thermoplastic material; vibration eliminated by rubber dampers located between motor and mounting. • Washable polyester-polyurethane prefilter. • Electrostatic double layer filter impregnated with activated carbon. • Ionizing electrodes selectable by means of a switch located on the top of the casing • On/off switch. • Fan speed controlled by 3-position rotary switch. • Power cord with moulded plug. • IMQ safety certification.