Short full-open airing instead of tilted windows

If you leave your window a few centimeters open all day (tilted), warm air constantly escapes. Better: open wide 3–4 times daily for 5–10 minutes (brief airing), then close. This exchanges air efficiently without wasting energy.

Step by step

With tilted windows there's constant air exchange from draft and pressure difference. Warm air slowly escapes, cold air enters. This runs for hours, your heating must replace the heat loss. With brief airing you completely exchange the air in 5–10 minutes. The building structure (walls, furniture) barely cools. Then close immediately, no more heat leak. The effect is clear: less heating energy for the same air quality.

Step by step

1. Set fixed airing timesCreate a routine: early after waking, midday, evening before dinner, before bed. Ideally scheduled (for example 8, 12, 18, 22 o'clock).
2. Open windows WIDEDon't tilt the window, open it properly: window frame fully down so top and bottom are open. In winter you can certainly get used to cold air, that's intentional.
3. Turn radiator off while airingWhile you ventilate, turn your radiator thermostat to 0. That way you don't heat the warm air you're just letting out. Return to normal after closing.
4. Keep the right duration5–10 minutes is the rule. In winter 5 minutes is enough; in summer could be 10 minutes. You'll know when air is exchanged: window frame and panes get cold, that's the sign.
5. Use cross-ventilation (with multiple windows)Open two opposite windows at once (for example bedroom + hallway). This creates a draft, air exchanges even faster, brief airing takes only 3–5 minutes.

Worked example

How much do YOU save with brief airing instead of tilting?