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The point is: you open those windows to let the humidity out. Warm air holds more water than cold air. The warmer it gets inside, the more humidity. If you don’
by rad_gruchalski 3y ago
The point is: you open those windows to let the humidity out. Warm air holds more water than cold air. The warmer it gets inside, the more humidity. If you don’t open your windows, the humidity escapes through least isolated areas, very often window sills. Sills get naturally colder, at below 12 degrees celsius you get mold in the sills. So, open your windows to blow the humidity out of the apartment but don’t open for too long so the sills don’t cool down too much, especially not below 12 degrees celsius.
- rawgabbit 3y agoIs there a modern type of window or device that will prevent mold, without requiring periodically opening the window?
- blacksmith_tb 3y agoYes, the device is a Heat Recovery Ventilator[1]. As you increase the insulation and airtightness of the windows to conserve energy, you need to bring fresh air in steadily (and pump air out). The HRV handles that, and passes the incoming air through a heat exchanger with the outgoing air, which is useful whether you're trying to keep warm air inside (in the winter) or cool air inside (in the summer. 1: https://en.wikipedia.org/wiki/Heat_recovery_ventilation https://en.wikipedia.org/wiki/Heat_recovery_ventilation
- rawgabbit 3y agoThank you for the link.