Vertical wall-mounted controlled mechanical ventilation unit, with high-efficiency (~90%) countercurrent heat recovery system, made with a prepainted steel plate frame and internal thermo-acoustic insulation. The unit is equipped with two centrifugal fans with constant flow EC motors, ISO ePM10 65% (M5) filters, 4 NTC type temperature sensors. Management via RDZ electronic control, digital inputs or room control panel. 2 siphons required