The instant water heater has a cold water inlet pipe, which passes through the resistance, heats up, and exits through the hot water outlet pipe. A necessary condition for the instant water heater to initially operate 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 reached by the hot water are pre-set so that one can use the hot water directly, without needing to mix it with cold water.
The maximum temperature that can be reached for hot water production is 60 °C, while the maximum water flow rate reaches up to 12.6 liters per minute. Indicatively, 38-42 °C degrees are standard for shower use.