Decentralized living space ventilation unit with heat recovery for controlled ventilation of individual rooms. Installation takes place directly in an external wall without air ducts. Always installed in pairs, the units are equipped with an efficient, pulsating and very quiet fan. While one ventilation unit pushes fresh air into the room, the second unit pushes the used air outside. After 70 seconds, the push-pull units change the air direction. A heat exchanger recovers the heat contained in the exhaust air in order to heat the supplied outside air. A wall sleeve (round, round insulated or square insulated version) and an external and internal panel made of metal are required for the installation. The compact control unit, which is not included in the scope of delivery, controls the air units.
