• Plastic (PPE) enclosure • Duct connection ports of nominal diameter 150 mm. • 2 EC (brushless) motors with shaft turning in ball bearings, each coupled to a backward curved centrifugal impeller; 3 speeds, selectable independently at the moment of installation. • Air flow settable between 50 m3/h and 350 m3/h. • Very high-efficiency counter-flow heat exchanger in PS resin. • Automatic, filtered 100% by-pass • Integrated frost protection. • 2 x ePM10 50% (M5) filters. ePM1 70% (F7) filter available as optional. • Electronic control with LCD display. • Brackets for wall mounting included.