A new build house with airtight windows
Short answer: New houses are airtight and well insulated, which keeps the warmth in. But the tight construction also holds on to moisture, and to heat in summer. With good ventilation and light clothing, the indoor climate can stay comfortable all year.
Why new houses feel different
Modern houses are built so that almost no air comes in through gaps. The insulation is thick and the windows have several layers of glass. That means the warmth stays inside and there are no draughts. On the other hand, the air has to be exchanged some other way, usually through a mechanical ventilation system. Without good ventilation the air can become heavy, humid and warm, which many people notice as a stuffy feeling in the evening.
The ventilation system
Many new houses have a system that exchanges the air and recovers the heat from it. It is meant to run all the time, and the filters need changing regularly. A clogged filter gives poorer air and more noise. Do not switch the system off just because it is cold outside. Read the manual, or ask whoever installed it, if you are unsure about the settings and how often the filters need replacing.
Warm summer nights
An airtight, well insulated house can get warm in summer, because heat from the sun comes in through the large windows and stays inside. Use external sun shading if possible, and air the house at night when the air is coolest. In the bedroom, light and breathable bedding matters. See bamboo fitted sheets, which feel smooth and cool against the skin.
Loungewear in a warm house
In a house where the temperature is high and steady, many people wear light clothing all year round. A jogging suit in a soft, light fibre is practical because it works both at home and for a quick trip outside. See bamboo jogging suit for men, which is light enough for a warm house and has a little more structure than sleepwear.
Everyday moisture
A household releases several litres of water into the air every day through breathing, cooking, showering and laundry. In an airtight house that moisture does not disappear on its own. Do not dry laundry indoors unless the ventilation is running, and use the cooker hood when cooking. A humidity level of 40 to 60 percent is a good target, and a small hygrometer will show you where you are.
Textiles and indoor climate
Rugs, curtains and cushions collect dust, and in an airtight house the dust stays in the air for longer. Wash textiles regularly and vacuum floors and furniture. If you would like to look at other brands with home textiles, you can browse Nordic Weaving. Choose textiles that can be washed, so they are easy to keep clean.
Frequently asked questions
Should the ventilation system run all year
Yes. It is designed to run constantly, including in winter, to keep the air fresh.
Why does my new house get so warm in summer
Large windows let in the sun's heat and the airtight construction holds on to it. Sun shading and airing at night help.
What humidity level is good
40 to 60 percent is a good target for most homes.
You can find the full range at Bamboo-Clothing.com.
