Page 10 - Rationel Windows | Operation & Maintenance

VENTILATION

& INDOOR

CLIMATE

All new windows are airtight. This often means that you need to change your
habits when getting new windows, as you might have had old and draughty ones
previously. The old, draughty windows made sure that your home was naturally
ventilated, even when you did not want it.

Now you have to make sure that your home is ventilated properly. It is a myth
that it wastes energy and money to ventilate your home; you just have to do it
correctly.
Leave a window or door wide open - it is ideal with a little draught. This way you
replace the warm and moist air in the home with cold and dry air from the
outside in less than 10 minutes. During this short period of time there will be no
cooling of heavy items like furniture, floors and ceilings and the loss of energy
will be at a minimum.
Proper ventilation is especially important in new buildings. Damp from new
walls and floors can stay in the home for up to two years.
If you make sure that your home is thoroughly ventilated a couple of times
every day - eg. bedrooms and bathrooms in the morning and kitchen, dining
room and living room in the evening - you will ensure that you and your family
have a pleasant and healthy indoor living climate.

CONDENSATION ON WINDOWS

Condensation on panes is often a sign of too little ventilation - but not always.
It depends on whether the condensation is placed on the inside, the outside or
between the two pieces of glass in the pane.

CONDENSATION ON THE OUTSIDE OF THE WINDOW – A GOOD THING
When condensation is placed on the outside of the window, it proves that it is
an energy pane and that it is working the way it should.
In some certain types of weather - for example, on a clear and frosty night, where
there is a large heat dissipation from the earth into the air - there can be times in
the morning where the outside surface of the pane is colder than the air outside.
This can result in external condensation in the middle of the pane. This type of
condensation will disappear when the temperature outside rises during the day.
This type of condensation is caused by the energy pane. The inner piece of glass has
a non-visible coating that reflects the heat back into the room. The space between
the two pieces of glass is filled with argon an inert gas. This means that heat from
the house cannot touch the outer piece of glass and heat it up. That is why it is
possible for the outside of the energy pane to become colder than the air outside.

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