How Can An On-Demand Tankless Water Heater Make Hot Water Instantly?
When you open a hot water tap, the tankless water heaters heating unit is activated by the cold supply water flowing into it. Whether the heater unit uses gas-combustion or electrical heating, the heat is applied rapidly to a large surface area of water which rapidly increases in temperature as it flows through the entire length of the heating unit. The water is essentially heated instantly, so that the time taken for hot water to reach the opened tap is essentially related to the taps distance from the tankless water heater unit. Since heating is only applied while water flows into the unit, the amount of energy consumed is dependent only on the amount of hot water used, and any residual hot water left in the pipe between the water heater and the tap. For applications located at a significant distance from a central water heater, a point of use tankless heater can be used to most efficiently provide truly instant hot water.
When you open a hot water tap, the tankless water heater’s heating unit is activated by the cold supply water flowing into it. Whether the heater unit uses gas-combustion or electrical heating, the heat is applied rapidly to a large surface area of water which rapidly increases in temperature as it flows through the entire length of the heating unit. The water is essentially heated ‘instantly’, so that the time taken for hot water to reach the opened tap is essentially related to the tap’s distance from the tankless water heater unit. Since heating is only applied while water flows into the unit, the amount of energy consumed is dependent only on the amount of hot water used, and any residual hot water left in the pipe between the water heater and the tap. For applications located at a significant distance from a ‘central’ water heater, a ‘point of use’ tankless heater can be used to most efficiently provide truly ‘instant’ hot water.
