Vasco. DX. Ventilation unit type D with heat recovery. 3 models: 400, 500 and 600 m3/h. Features: very low power consumption, unique Octogon heat exchanger, high reduction E-level, extremely low noise level, automatic and constant flow control, modulating bypass for optimal comfort feel (summer night ventilation), high installation convenience: both horizontal and vertical mounting possible (mounting set included), maximum flexibility: reversible front and rear, 2 internal connections at top and rear, compact sleek design. ErP Ready.