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  2. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    An 80 US gal (300 L; 67 imp gal) electric storage tank water heater was able to have a minimum energy factor of 86% under the pre-2015 standard, while under the 2015 standard, the minimum energy factor for an 80-gallon electric storage tank water heater is now 197%, which is only possible with heat pump technology. This rating measures ...

  3. Minimum energy performance standard - Wikipedia

    en.wikipedia.org/wiki/Minimum_energy_performance...

    An electric fan is required to shift air at a specified rate while consuming a limited amount of power. A storage water heater providing hot water for sanitary purposes is required to heat up a specified quantity of water to a specified temperature and store it at that temperature for a specified time while consuming a limited amount of energy ...

  4. Power rating - Wikipedia

    en.wikipedia.org/wiki/Power_rating

    For AC-operated devices (e.g. coaxial cable, loudspeakers), there may even be two power ratings, a maximum (peak) power rating and an average power rating. [5] [6] For such devices, the peak power rating usually specifies the low frequency or pulse energy, while the average power rating limits high-frequency operation. [5]

  5. 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 ...

  6. Electric arc furnace - Wikipedia

    en.wikipedia.org/wiki/Electric_arc_furnace

    The electric arc temperature reaches around 3,000 °C (5,400 °F), thus causing the lower sections of the electrodes to glow incandescently when in operation. [8] The electrodes are automatically raised and lowered by a positioning system, which may use either electric winch hoists or hydraulic cylinders. The regulating system maintains ...

  7. Air preheater - Wikipedia

    en.wikipedia.org/wiki/Air_preheater

    They may be used alone or to replace a recuperative heat system or to replace a steam coil. In particular, this article describes the combustion air preheaters used in large boilers found in thermal power stations producing electric power from e.g. fossil fuels, biomass or waste.

  8. Own a pool in Southern California? New air-quality rule ...

    www.aol.com/news/own-pool-southern-california...

    The rule will lead to the replacement over three decades of more than 1 million gas-burning appliances — including an estimated 700,000 pool heaters and 300,000 tankless water heaters — with ...

  9. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    A hybrid water heater is a water heating system that integrates technology traits from both the tank-type water heaters and the tankless water heaters. [5] It maintains water pressure and consistent supply of hot water across multiple hot water applications, and like its tankless cousins, it is efficient and can supply a continuous flow of hot ...

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