Reversing single-room ventilation system with heat recovery that creates a more pleasant indoor climate. Ideal for homes or commercial premises, for rooms up to 25m², with an internal ceramic heat exchanger. Supply and extract air flows are cleaned by two built-in air filters with a total filtration G3. Indoor unit dimensions are H215 W215 D60mm with a decorative panel. The axial fan features a reversible DC motor, which can be controlled via the control panel or remote control. It has two operating modes: ventilation or extraction and regeneration mode. Automatic ventilation and extraction occur in 70-second cycles with automatic energy recovery. There are three speed levels, an integrated operating hours counter, and a visual filter change indicator on the display. Two devices can be operated together. Heat recovery efficiency is up to 92%. Maximum speed is 2330 rpm, and the maximum flow rate is 50 m³/h. The maximum temperature of the air to be transported ranges from -15°C to +50°C. The outdoor unit dimensions are H250 W215 D60mm. It includes a telescopic connection pipe Ø160xL250-500mm, rated IP24.