What is healthy indoor air?

"Healthy indoor air" refers to contamination-free air, similar to drinking water. "Healthy indoor air" stands out by its cosy temperature of 20° C to 22° C and the right degree of air humidity (not too little, not too much). In winter, a relative humidity of 30% – 45 % is ideal.

How "healthy" indoor air is depends on the quality of the outside air introduced and on the level of harmful substances and contaminations inside the building. Sources of harmful substances in rooms are furnishing items (floor, furniture, carpets etc.) and people themselves. People emit organic substances and odours to indoor air. This is why air should be exchanged at regular intervals. To ensure good indoor air quality, around 36 m³ of air have to be exchanged per hour and per person. Normally, this allows to sufficiently remove harmful substances emitted from furnishings.

Healthy indoor air is a result of building materials and furnishings with a low level of harmful substances and regular exchange of air with filtered outside air from which dust, soot, pollen etc. have been largely removed.