How much electricity does the instantaneous water heater consume?

Hello! For all of these questions, a single answer "depends on the specific heater / hob / oven." And also from their mode of operation. To calculate the consumption of an electrical appliance you need to multiply its power by the number of hours that they work without a break per day / month / year. In this case, the power, for example, of an electric stove is indicated by the total how much it consumes if all burners are turned on at full power.

In this case, for example, the hob will consume depending on the number of burners turned on.

At the same time, the power consumption depends on what temperature of heating is set on the appliance, but the burner can also be turned on “at maximum” or “at minimum”, because in most modern stoves there is a power regulator. On water heaters also, the more temperature you wind up - the more it will consume.

The power of ovens is usually 1-3 kW, hobs an average of 3-7 kW. This is common. You can roughly calculate how many minutes and on what “fire” you will cook soup, porridge - you will find out how much it will “eat”.

It’s not entirely clear whether you want a flow heater instead of a column, or a boiler that heats both heating and water?

Flowing water heaters, like gas water heaters, are selected according to the number of water withdrawal points, or in another way - from how many taps you need to dispense hot water at the same time and to what temperature it needs to be heated ...

The power of the electric boiler “from ancient times” is considered according to the formula: 1 kW per 10 m² of heated area. But it does not take into account anything, neither how well the house is insulated, how much heat loss from cracks, windows. Also, if you live in the north and it is very cold in winter, and the frosts are lingering, then you can multiply the resulting value by 1.5-2, and if somewhere in Sochi, then less can be.

Well, in fact, how many amperes you put into input will be allocated - you won’t be able to connect more of this power.

By wiring: we connect the boiler, electric stove, instantaneous water heater to separate machines and lay our own cable to each one and connect it directly, or we put a power socket at 32A (for single-phase power up to 6-7 kW).