Velux GGU INTEGRA Uživatelský manuál stáhnout pdf (Strana 107)

Building physics

VELUX 107

Ventilation of habitable rooms

One person secretes approx 3 l of water vapour a day via the exha-

lation air. Additionally, in a standard one-family house

15 l of water vapour a day are generated from bathing and cooking.

This will result in an increase in the level of humidity if the indoor

air is not renewed.

A high level of humidity creates mould and mould fungus that can

cause both health problems and damage to building components.

Therefore, to comply with building regulations, a minimum of air

renewal must be provided in dwellings to maintain a good indoor

climate and reduce the eects of moisture on the construction of

the house.

Of course, the amount of smell and moisture eect diers from

dwelling to dwelling. In addition to the building regulation require-

ments by observing the following general guidelines it will in most

cases be possible to maintain a low level of humidity.

• It is recommended to air habitable rooms 3-4 times a day, each

time for 5-7 minutes.

• Rooms with a high level of humidity such as kitchens and bath-

rooms must be aired with mechanical air extraction.

• Heating should not be turned o during airing as the cold outdoor

air should be heated immediately after the windows have been

closed again.

• Rooms should not remain unheated for long periods of time as

this results in an elevated level of humidity. If the bedroom is kept

cold at night, it should be re-heated during the day.

• Avoid drying laundry indoors.

When airing brieﬂy,

walls and furniture

do not get cooled and

consequently the heat

loss is minimal.

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Velux GGU INTEGRA Uživatelský manuál Strana 107