Electric water heaters' standby losses depend on water usage, tank size and other factors.

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Debunking Myths on Electric Water Heaters

1. Lowering the temperature on an electric water heater will only turn my showers cold and won't translate into significant savings.

By turning down the temperature a few degrees, you will save a lot of energy at the end of the month and likely, you won't even notice the difference in your showers temperature. The most efficient way to set up your water heater is to put it at a temperature where you don't need mix any cold water.



2. A new smart electric water heater implies more savings.

Even though your new smart electric water heater may save you a bit more money every month in comparison to your 10 year-old one, these are only marginal savings. The additional cost of the new electric water heater must also be taken into account! Even if you replace your old electric water heater for a new smart one, these will cost you at least 200 euros and you will only save up to 94 euros in a year.
Check out this comparison table with some better options than replacing your old electric water heater.

3. An older electric water heater implies dirty water.
Not really. Electric water heaters are projected to last years without collecting any rust.  But if you notice any rust-colored water you must call a technician.


4. Older electric water heaters aren't safe 
If the installation was done by a qualified professional, old electric water heaters fit the security rules and code existing at the time of the installation and should not constitute an additional hazard risk.


5. An electric water heater needs a lot of maintenance

The most important maintenance step is to check the sacrifice anode according to your water hardness. These are easily corroaded materials that are installed in a pipe or tank, in order to be sacrificed to corrosion, preventing the water heater itself from corrosion.
If you live in a region with soft water, then these devices are almost maintenance free!


6. There's no impact if my water hear is installed outdoors or indoor

An elecric water heater placed inside needs to turn ON several times during the day to keep the water hot inside, since heat can escape through its walls, representing a waste of ~1.2kWh/day.
If that same electric water heater is placed outside, where the temperature is significantly lower than the one inside the water heater, specially in the winter, there will a higher heat loss through its walls. This means the water heater will turn ON even more times during a day,to keep the water hot, which will result in a higher energy consumption.


7. If I'm not using hot water  then my electric water heater is not wasting energy.

As soon as finish to shower your electric water heater starts to heat up water straight away even though most probably you will only need hot water again by the end of the day or next morning! Electric water heaters waste more than 90 EUR per year per family, on standby losses, which are higher than all other appliances combined.






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