(There's more on the types of solar water heaters here.)ĥ0% more efficient than gas/electric water heaters.Ĭan be used in any climate, and the fuel-sunshine-is free and a renewable resource. There are two types of solar water heating systems: active, which have circulating pumps and controls, and passive, which don't. Solar water heating systems include storage tanks and solar collectors. Hot water output limited to about 2-5 gallons per minute multiple heaters may be needed if hot water demand is high. Tankless water heaters, also known as demand-type or instantaneous water heaters, provide hot water only as it is needed, eliminating standby heat loss.Ĩ%-34% more efficient than storage water heaters.Ĭould save $100 or more annually with an ENERGY STAR qualified tankless water heater. Standby heat loss can occur, wasting energy even when a hot water tap isn't running. Cold water fills the bottom of the tank after use.Īllows for simultaneous, multiples uses of hot water. WATER HEATER TYPEĪ storage water heater holds a reservoir of hot water and operates by releasing hot water from the top of the tank when you turn on the hot water tap. So to help make things easier, here are all the basics in one place. While the Energy Saver water heating section, has a lot of great resources for saving money on water heating, there are a lot of choices. So investing in a more energy efficient water heater is an important step for saving energy costs. Water heating is the second largest expense in the average American home, In fact, the average household spends 14%-18% of their utility bill on water heating - that equates to approximately $400-$600 each year.
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