Check how quickly the home responds
A radiator system in a responsive room behaves differently from slow underfloor heating. A well-insulated home may lose little temperature overnight, so a deep setback can add little benefit. Heat pumps and weather-compensated systems can lose efficiency if recovery needs much hotter water. Follow the installer’s control guidance rather than imposing one schedule on every system.
Lower is not the same as off
Keep frost protection and necessary room temperatures. Take extra care with vulnerable occupants, cold outside walls and moisture problems. Warmer air can hold more moisture; as air cools, relative humidity rises even without added water. A dry-looking room is not proof that hidden cold surfaces are safe.
Run a small, reversible comparison
Record evening and morning temperatures, humidity, comfort and the heating meter over several comparable days. Note occupancy and outdoor weather. Change one setting at a time. Do not interpret a lower bill during warmer weather as proof of savings from the schedule.
Morning recovery matters
If rooms take too long to recover, adjust start time or reduce the setback. Avoid using an expensive portable heater to compensate for an unsuitable schedule. Central and room controls should work together; check the manual or ask an installer if they seem to fight each other.
Common questions
Is one night temperature right for all homes?
No. Building fabric, moisture, occupants and heating response matter.
Should a heat pump always switch off overnight?
No. Efficient operation can favour steadier settings. Follow system-specific advice and measure the result.
Sources and limits
Technical sources below are in German, checked for the original guide on 4 October 2026. These adaptations do not establish local rental law, installation rules or tariffs. Follow local requirements and the instructions for your actual system.