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I would like to receive some help about the next question:

Is it better to have water heater in bathroom, always turned on, or is it better to turn it on only if i need hot water (for showering or washing dishes)? Precisely, what is better for the water heater?

Thank you, for your time ahd help!

  • What do you define as "better for your water heater"? This is at best a vague question that you are asking. – holroy Feb 12 '19 at 23:15
  • What kind of water heater are we talking about? A boiler (large tank with heating element) or a device that heats the water when it is used (tankless heater)? – Hobbes Feb 13 '19 at 8:49
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The water heater doesn’t have to be on all the time. Turning it of could save energy.

This is a very common myth. But in fact, you really don't need to be heating your water all the time. Your immersion heater or boiler will heat up hot water which is stored in a tank. As long as the tank has a good insulating jacket, it will keep the water hot all day, without needing to be constantly reheated.

  • Thank you for your answer! I am more interested in what is better for water heater and not in energy saving. – MathsLearner Feb 11 '19 at 19:05
  • @OgnjenMojovic it would probably be best to still turn it of as then the water heater will be on for less time and hence its life will be extended – user26899 Feb 11 '19 at 19:21
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Water heaters don't stay on all the time. They are just like a heater or air conditioner connected to a thermostat in a home: they only stay on if the temperature gets too far away from the temperature that the user set. That means that if your water heater is very well insulated, it may only turn on a few times a day - especially after intense use by a shower, a dishwasher, or a clothes washing machine.

If you will be gone for a few days, or don't need hot water for a few days or a few weeks, you should be able to turn it off. However, it will take some period of time (probably at least an hour) for the water in it to reach its normal hot temperature once you turn it on again.

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