Causes for indoor
climate problems

An ordinary family consisting of a father, mother and two children produces 10-15 litres of water vapour each day.

The many litres of water come from sweat and exhalation air. Naturally that becomes even more, when we have guests. Dogs, cats and other pets also contribute to higher atmospheric humidity in the house. But we produce even more humidity than the humidity coming from our bodies.

Cooking
When we make and serve hot food, a lot of steam slips past even the most efficient cooker hood.

Washing and cleaning
Whenever we clean the house or wash clothes we are increasing the humidity. It becomes even worse if we dry the clothes indoors. And that does not only apply to freshly washed clothes, but also to wet outerwear and footwear due to rain or snow.

Bath
When you pamper yourself with a good long hot bath, there is not just humidity in the air as long as you can see the steam. Wet tiles, floors and towels continue to add humidity to the air for hours.

Fill a pool each year
All things considered, a family produces thousands of litres of water vapour each year. Enough to fill a swimming pool. If the house is not equipped with vents as prescribed by building regulations, and if you forget to air the house thoroughly, it is no wonder you get problems with high humidity. It can simply not be avoided in the airtight, superinsulated houses which many people are living in today, and which anyone who builds a new house will come to live in.

Furniture and materials
It is not always a sign of quality when something smells new. The scent actually reveals that an evaporation and degassing of the atmosphere are in progress. There might be both humidity and various chemical vapours present which affect the air quality negatively. They may come from brand new furniture which just like the building materials in a new house take very long to vapour completely.

Other types of pollution
The indoor climate can also be burdened by pollution from e.g. smoking, candles, particles from a woodburning stove, degassing from newspapers and magazines etc. That kind of pollution is effectively depolluted with a ventilation system that ensures a constant air circulation as well as a filtration of the air.

The filters also help reducing the air pollution from outside. If you open doors and windows you also let smoke, noise and scrap from the street inside. This is avoided with a ventilation system.

Furthermore the ventilation system is also effective in relation to the pollution coming from the subsoil. E.g. radon, which is considered to be carcinogenic in large quantities. Several places in Denmark the level of radon in the subsoil is high above the amounts which are considered to be safe.

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