Overview
- Consumer groups and the DVFG advise running heating at a low, constant level instead of jojo up‑and‑down adjustments to curb energy use.
- In spring, air rooms three to four times daily for 10 to 15 minutes via shock or cross‑ventilation, and close radiator valves while airing to avoid waste.
- Lower rather than switch off in poorly insulated buildings to prevent deep cool‑downs, while well‑insulated homes can reduce sooner.
- Clean radiators at season’s end to restore heat output, and consider a professional hydraulic balancing that saves about five percent annually according to the Verbraucherzentrale.
- Monitor indoor humidity to prevent mold, note that trimming the setpoint by one degree saves roughly six percent of heating energy, and consider smart thermostats that studies from Fraunhofer suggest can further cut use.