Two permanently corresponding units can ventilate up to two rooms of max. 15 m2 each: While one ensures the removal of stale air, the other ensures that fresh air flows in. The air volume flow changes every 70 seconds. The planning can be done individually and depending on the use of the living spaces, e.g. only individual rooms can be equipped with ventilation. It is important that they are installed in pairs. - Ideal for rooms up to 15 m². Can be used in pairs in a single room or in two adjacent rooms. Can be combined as a hybrid solution with conventional ventilation, e.g. in the bathroom.- Alternating supply and extract air operation. Transfers up to 99 % of the heat contained in the extract air to the supply air at a volume flow rate of 10 m³/h.- Well controlled. Integrated automatic temperature control uses the cold supply air to cool down overheated rooms.- Clever functions. Integrated sleep timer with pause function, which switches back to the last selected ventilation level after the set time has elapsed.- Easy to install. Quick installation in pairs thanks to thermally decoupled shell set or retrofittable wall sleeve.