Tankless water heaters are compact heating units that provide hot water as it is needed, and do no store hot water like traditional tank-type water heaters. When a hot water tap is turned on, water enters the tankless water heater. A sensor detects the water flow, and activates an electric or gas heating device, which quickly raises the water temperature to a preset level. When water flow stops, the heating element shuts off. This can create up to a 40% energy savings, endless hot water, and significant space savings.
Conventional Water Heaters
To keep your water heater running efficiently, drain the sediment that accumulates in the bottom of the water heater at least twice each year.
Open the drain valve at the bottom of the water heater and drain it into a bucket until the water runs clear (maybe four or five gallons).