The semi-central version with an enthalpy exchanger and a capacity of 80 m³/h, is designed for recessed installation for example in a living room. This recessed version of the Ease 100 can also be connected to additional rooms, such as a bathroom and/or bedroom, as the unit has four Ø75 mm ports for connection to the Air Excellent System. If additional ducts are impossible or undesirable, an indoor mixfan can also be installed between the living room and bedroom of two-room apartments. Installation is simple thanks to the mounting frame for recessed fitting in the wall. The frame is installed during the shell construction phase. This Ease 100 is particularly suitable for student accommodation and assisted living facilities.