Tankless water heaters in our homes are the wave of the future. they have been the standard in europe for over 30 yrs. Tankless water heaters provides hot water on demand, which saves you energy and money. The way that it works is once the faucet is turned on, water is then heated while it flows through the heating coil or heat exchanger, then on to the faucet. the supply of hot water is unlimited. we are trained on the complex operations of tankless heaters and would love to answer any question you may have about these type of water heaters.