Instantaneous water heaters work with natural gas or LPG. It is used only for domestic hot water needs. In case of the need for hot water, it starts to work and thanks to the heat generated by the burning of the gas, the water supplied to the device with the mains pressure, provides the water with the set value to the user at the desired level. Thanks to the safety equipment on it, it shuts down the device in case of water cuts without user intervention.