The instant water heater has a cold water inlet pipe, which passes through the heating element, gets heated, and exits through the hot water outlet pipe. A necessary condition for the instant water heater to initially function is the pressure of the cold water inlet should not be too low.
The water temperature is regulated by a thermostat, so it does not exceed a maximum value. The temperatures that the hot water reaches are preset so that one can use the hot water directly, without needing to mix it with cold water.
The maximum temperature it can reach for hot water production is 42 °C, while the maximum water flow rate reaches up to 10 liters per minute. Indicatively, 38-42 °C degrees are standard for shower use.