Electronically controlled instantaneous water heaters heat the water to exactly the set temperature. The heating power is constantly controlled to keep the outlet temperature constant to the precise degree, despite changes in the flow volume or feed temperature. That makes them very convenient and avoids the nuisance of temperature fluctuations. For instance, if someone turns on the hot water tap at the basin while you are taking a shower, the water temperature fluctuates very perceptibly with hydraulically controlled continuous flow heaters.  Because they are so precisely controlled, electronic instantaneous water heaters consume approximately 30% less energy than hydraulically controlled units. And because there is no need to mix cold and hot water in order to draw hot water at the correct temperature with the instantaneous water heater, additional water and energy savings are achieved.

The K5 water boiler.

Yes, because small tanks need ‘stand-by energy’ to keep the water inside at the selected temperature. The mini instantaneous water heaters, on the other hand, only consume the energy they actually need to heat the quantity of water drawn off. Also, because the mini instantaneous water heater is set to a more economical flow, additional water and energy savings are achieved.