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  2. EnergyGuide - Wikipedia

    en.wikipedia.org/wiki/EnergyGuide

    Clothes washers, dishwashers, refrigerators, freezers, televisions, water heaters, window air conditioners, mini split air conditioners, central air conditioners, furnaces, boilers, heat pumps, and other electronic appliances are all required to have EnergyGuide labels. [1]

  3. Annual fuel utilization efficiency - Wikipedia

    en.wikipedia.org/wiki/Annual_fuel_utilization...

    The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers.The AFUE differs from the true 'thermal efficiency' in that it is not a steady-state, peak measure of conversion efficiency, but instead attempts to represent the actual, season-long, average efficiency of that piece of equipment ...

  4. Energy rating - Wikipedia

    en.wikipedia.org/wiki/Energy_rating

    EnerGuide, labeling and rating of the energy consumption or energy efficiency of specific products used in Canada; Building energy rating; Energy efficiency rating, a score applied to dwellings in the Australian Capital Territory; House Energy Rating, a building's thermal performance for residential homes in Australia

  5. Air source heat pump - Wikipedia

    en.wikipedia.org/wiki/Air_source_heat_pump

    With losses in efficiency, an ASHP can even provide full central heating with a flow temperature up to 80 °C (176 °F). [2] As of 2023 about 10% of building heating worldwide is from ASHPs. They are the main way to phase out gas boilers (also known as "furnaces") from houses, to avoid their greenhouse gas emissions. [3]

  6. Furnace (central heating) - Wikipedia

    en.wikipedia.org/wiki/Furnace_(central_heating)

    A furnace (American English), referred to as a heater or boiler in British English, is an appliance used to generate heat for all or part of a building. Furnaces are mostly used as a major component of a central heating system .

  7. Seasonal energy efficiency ratio - Wikipedia

    en.wikipedia.org/wiki/Seasonal_energy_efficiency...

    In the United States, the efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER) which is defined by the Air Conditioning, Heating, and Refrigeration Institute, a trade association, in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [1]

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