TLA Office · Base Guide
How heating and airing out work in a German home.
German buildings are sealed tight for efficiency, so ventilation is handled a little differently than in a typical US home with central air. Here is the local approach.
Why it works differently here
Because German homes are built airtight, moisture from everyday cooking, showering, and drying does not escape on its own the way it might in a draftier or centrally ventilated house. The local habit is to air out on purpose, in short bursts, which keeps humidity in check and keeps walls and windows dry through the winter.
Air out in short bursts (Stoßlüften)
The German approach is short, complete air exchanges rather than a permanently cracked window.
- Open windows fully, not just tilted, for about 5 to 10 minutes
- Do it a few times a day, and after showering or cooking
- Open windows on opposite sides for a cross breeze when you can
- Mornings are ideal, when the outside air is driest
A tilted window left open all day mostly cools the wall around the frame without exchanging much air, so a short, wide-open airing does more in less time and uses less heat.
Keep the heat steady
Warm walls do not attract condensation, so steady, even heat helps.
- Around 20 to 21°C in living rooms is a comfortable target
- Keeping rooms from going fully cold, even the ones you use less, helps
- Leaving radiators clear, so curtains or furniture do not block the heat
Keep an eye on humidity
Indoor humidity sits best in the 40 to 60 percent range.
- Air the room well if you dry laundry indoors
- Run the extractor fan or crack a window after showering and cooking
- A small hygrometer makes the level easy to read at a glance
Furniture and doors
Two small habits protect the coolest spots in the home.
- Leave a gap of 5 to 10 cm between furniture and exterior walls, so air can move behind it
- Keep doors between warm and cooler rooms closed, so warm humid air does not drift into a cold room and condense
Settling in near Ramstein?
Our furnished homes are move-in ready, and our team is happy to help you get your bearings when you arrive.
Frequently asked questions
What is Stoßlüften?
It means opening windows fully for a few minutes to exchange the air completely, a few times a day. It clears out moist indoor air quickly and is more effective than leaving a window tilted.
How often should I air out the home?
A common rhythm is a few times a day for 5 to 10 minutes, plus after showering, cooking, or drying anything. A quick cross breeze does the job fastest.
What temperature and humidity should I aim for?
Living rooms around 20 to 21 degrees Celsius, and indoor humidity ideally between 40 and 60 percent. Keeping rooms from getting cold helps, since cold walls are where condensation forms.
Why does mold form on outer walls or behind furniture?
Exterior walls are cooler, so humid indoor air can condense there. Keeping those rooms warm and leaving a few centimeters of space between furniture and outer walls lets air move and keeps the surface dry.
Can I just leave a window tilted all day?
It is not the most effective approach. A tilted window cools the wall around the frame without exchanging much air, while short, fully open airing a few times a day clears the moisture and uses less heat.
Source: standard German heating and ventilation guidance for tenants (Stoßlüften), consistent with German environmental and property-management advice on preventing condensation and mold.