Experts reveal the golden rule for truly reducing the bill

Every winter, the same question arises in millions of homes: should you turn off the heating completely at night or simply lower it?
Between fear of being cold, fear of a high bill and deeply ingrained misconceptions, it is difficult to know what the best solution is.

However, the experts’ answers are now clear, measured, and above all, based on concrete data. Here’s what you really need to do to save money without sacrificing your comfort.

The experts’ golden rule: never turn everything off.
According to recommendations from ADEME (French Agency for Ecological Transition), turning off the heating completely at night is not the best solution in the majority of homes.

The golden rule is simple:

The temperature should be lowered by 2 to 4°C compared to the daytime heating, but not turned off completely.

Concrete example:
Daytime temperature: 19 to 20°C
Ideal nighttime temperature: 16 to 17°C
This slight decrease allows:

Immediate energy savings.
Improved thermal comfort upon waking.
Protection of the system against humidity and frost.
Why switching off the heating completely can cost more.
Contrary to what many believe, completely switching off the heating can lead to: