Energy sobriety: this trick will reduce your electricity consumption by -20 to -30%

The hot water preparation in a household is often incorrectly regulated. Here’s how you can take steps to significantly reduce your bill.

What if that was the end of abundance? As the government is set to present its energy saving plan this Thursday, the French are being urged to make harmless gestures that will avoid excessive electricity consumption. And to persuade, the state will highlight those actions that are good for your bills and good for the planet.

And among them, a tip that few French people think of: the temperature of the hot water. A government communication campaign next week will invite the French to make this small gesture, which will be far from trivial as it can reduce electricity bills by -20 to -30% in a few months.

You should know that the water coming out of your water heater is between 65°C and 70°C and can get up to 80°C if the setting is wrong. “A temperature that you will never use, otherwise you risk burning your hands,” government spokesman Olivier Véran said on Wednesday.

Lowering the temperature to around 60°C allows immediate savings. In fact, according to Ademe, water heating can account for up to 20% of household energy use, or an average of €270.

In addition, the production of this waste heat costs every household 83 euros per year.

Be aware of the risks of legionellosis

However, be careful not to drop the temperature below 55°C as this could encourage the development of bacteria such as Legionnaires’ disease.

The pros agree, the ideal temperature is 60°C! And if it’s good for your bill in the short term, this tip is also good in the medium and long term. The hotter the water, the more limescale forms. And therefore the wear of the cumulus will be faster.

But when it comes to hot water, there is another tip that is even more interesting for saving: invest in flow restrictors (aerators and efficient showers). They enable a household to save 40 euros per year.

How to lower the temperature of your cumulus?

The gesture is not very complicated for any do-it-yourselfer, but it may also require the intervention of a professional for greater safety.

The thermostat is located under the water heater and sometimes a cover needs to be removed.

Some models are equipped with a dial that shows the temperatures directly.
Others are given a scale from 1 to 5. At this point, read the water heater instructions to find out where to place your cursor. If in doubt, turn the dial to position 3 or 4. Then measure the temperature at the faucet after the water heater has started. Just put a thermometer under the water. If it’s too cold you’ll need to raise the slider, if it’s too hot you’ll need to lower it a bit.

Slightly less accurate, some dials only show “+ and -“. Before any intervention, measure the temperature of the tap water. Depending on this, adjust the settings. Insert your screwdriver into the slot provided, then turn in the + or – direction as needed.

Turn off the water heater when you’re away

Note, one last gesture to save on your electricity bill. If you are absent for 3 days or more, do not hesitate to cut your cumulus. It uses less energy when charging than if it had to maintain hot water every day while you were away. Only downside, you won’t have hot water when you return…

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