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  2. Storage water heater - Wikipedia

    en.wikipedia.org/wiki/Storage_water_heater

    Solar heat is clean and renewable. This is the most modern system. Increasingly, solar powered water heaters are being used. Their solar thermal collectors are installed outside dwellings, typically on the roof or walls or nearby, and the potable hot water storage tank is typically a pre-existing or new conventional water heater, or a water heater specifically designed for solar thermal.

  3. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    A BTU is the energy required to raise one pound of water by one degree Fahrenheit. A US gallon of water weighs 8.3 pounds (3.8 kg). To raise 230 L (60 US gal) of water from 10 °C (50 °F) to 50 °C (122 °F) at 90% efficiency requires 60 × 8.3 × (122 − 50) × 1.11 = 39,840 BTU. A 46 kW (157,000 BTU/h) heater, as might exist in a tankless ...

  4. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    Gas water heaters have an exhaust vent or one to two exhaust pipes on the top, and still require electric power for electronics, sensing and ignition. A three-phase, 21 kW, 400-volt tankless water heater in Europe, with new European color coding for three-phase power. There are also heaters that use several single-phase circuits instead.

  5. Rheem Manufacturing Company - Wikipedia

    en.wikipedia.org/wiki/Rheem_Manufacturing_Company

    The company acquired the John Wood Manufacturing Company of California, which produced automatic gas storage water heaters, in 1931. [11] The company expanded overseas to Australia in 1939, building a plant in Sydney to make water heaters. [13] [14] In 1941, the company became the largest manufacturer of automatic water heaters in the United ...

  6. Energy factor - Wikipedia

    en.wikipedia.org/wiki/Energy_factor

    The energy factor metric only applies to residential water heaters, which are currently defined by fuel, type, and input capacity. [5] Generally, the EF number represents the thermal efficiency of the water heater as a percentage, since it is an average of the ratio of the theoretical heat required to raise the temperature of water drawn to the amount of energy actually consumed by the water ...

  7. Chip heater - Wikipedia

    en.wikipedia.org/wiki/Chip_heater

    The chip heater was very similar to the gas and kerosene-powered "geyser" hot water heaters, popular in Australian suburban residences from the 1920s. The main difference was the fuel source. The Australian manufacturer, Metters Limited, supplied gas geysers for city clients (who had access to gas) and chip heaters for country clients.

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