The air purifier optimises the air quality and climate in indoor living spaces by passing the air through five different filter layers and then releasing it back into the room free of pollutants such as formaldehyde and benzene. In this process, the device also prevents the increase in CO2 content – harmful components in the room air can then escape through the door and window gaps to the outside. A heat exchanger supplies the room with heat. The slim shape allows for installation also in confined interiors, while the touch display facilitates easy operation.