A comment
Usually, if you do not turn on the boiler in advance, you have to wait a while until the water in the tank heats up and it will be possible to take a shower. The second way out is to keep the water hot (the boiler turned on) constantly, but it is not economically profitable, the heat that we paid for goes through the walls. Therefore, I was interested in Ariston's ABS PRO ECO POWER with a quick heating system.
It costs more than ordinary models, but after calculating it approximately beforehand, I decided that energy saving and comfort would pay off. According to the results of use for six months, I can say that I was not mistaken. The amount by which payments for electricity decreased over this period has already covered 20% of the price difference with the device without quick heating. Simply, we do not keep the heater on all the time, and, rising from the bed, press the power button, while you can cook breakfast, you can go to the shower and turn off when you leave the house.
Minuses
More expensive than usual but pays off