Meet the Essency EXR : an 0n-demand tank-type water heater that delivers water at stable temperatures on-demand. It combines with your phone for easier control and output monitoring. The EXR relies on SmartCore Technology to perform like a tankless water heater. It is good for 9 back to back showers. Here is how it works:
When hot water is drawn, fresh water is run through a heat exchanger, where energy from super-heated water in a storage tank is instantaneously transferred to the water.
This water heater has a convenient touchscreen display. It comes with vacation, boost and water saver modes. The EXR uses standard plumbing and electrical connections.