Avent D160 fresh air unit with heat recovery cross-counter-current heat exchanger made of plastic. with each 2 connectors (FOL / AUL / ZUL / ABL) at the front sides of the units NW125, with Constantflow regulation or with CF regulation radio remote control incl. alarm function and 4 ventilation levels according to DIN 1946-6 Capacity level 3: 140 m3/h