• Zinc-coated pressed steel enclosure; interior lined with sound-absorbent and fire-resistant material. • Inlet and outlet duct connection ports compatible with nominal diameters of 100 mm and 125 mm. • 2 x EC brushless motor of external rotor design with shafts turning in ball bearings, each coupled to a backward curved centrifugal impeller; 2 speeds, selectable independently at the moment of installation and controlled by electronic circuitry capable of monitoring any malfunctions, which are logged by the microchip installed in the unit. • Air flow settable between 25 m3/h and 165 m3/h • High-efficiency counter-flow type heat recovery unit fashioned from moulded plastic (PS). • Automatically activated system designed to prevent icing of the heat exchanger. • Optional external filter kit with G3 element. • Condensate drain hose • Pipette for connection of drain hoses • Condensate collection vessel with overflow protection. • Mounting brackets for false ceiling installation supplied as standard. • Air intake grille complete with mesh filter supplied as standard.