What is a solar water heater?
Solar water heaters use the sun's thermal energy to heat water. These units are usually designed to serve as pre-heaters for conventional storage or tankless water heaters. A solar collector absorbs thermal energy from the sun and transfers this heat to water in a storage tank or water entering ...
- What is a heat pump water heater?
Heat pump water heaters use electricity to move heat from one place to another instead of generating heat directly. Therefore, they can be two to three times more energy efficient than conventional electric resistance water heaters. To move the heat, heat pumps work like a refrigerator in rever ...
- What is a demand (tankless) water heater?
Demand (tankless or instantaneous) water heaters heat water directly without use of a storage tank. A gas burner or electric element heats water only when there is a demand. Note: There has been some concern expressed about using these units in areas with “hard” water (calcium-carbo ...
- How can I save money on water heating?
If you have an electric water heater, install a timer that allows you to turn the unit off at night when not in use—you'll save an additional 5 – 12% on energy needed to heat the water. In addition, some utility companies may offer incentives for customers who permit control devices ...
- What should I consider when purchasing a new water heater?
You need a water heater capable of providing adequate amounts of hot water during your household's busiest times of the day. For help in determining your family's peak hour demand for hot water, see the Consumer's Guide to Energy Efficiency and Renewable Energy at http://www.eere.energy.gov/con ...
- What is a storage water heater?
Storage water heaters are the most common type. Water is heated in an insulated tank. When the hot water tap is turned on, hot water moves out of the top of the water heater and cold water flows into the bottom of the tank to replace the hot water going out the top of the tank. Source: UF/IFAS ...
- What is an indirect water heater?
Indirect water heaters use the home's heating system as the heat source, but the water from the boiler is circulated through a heat exchanger in a separate, insulated tank. Since hot water is stored in a storage tank, the boiler does not have to turn on and off as often. Source: UF/IFAS Energy ...
- What are gas-condensing water heaters?
Gas-condensing water heaters are similar to conventional gas storage water heaters with a few exceptions. The major enhancement these units have, over the conventional units, is the ability to capture the heat of condensation of the combustion gases. The burner heats the water like typical gas s ...
