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2. 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.

3. Washing machine - Wikipedia

   en.wikipedia.org/wiki/Washing_machine

   Washing machines perform several rinses after the main wash to remove most of the detergent. Modern washing machines use less hot water due to environmental concerns; however, this has led to the problem of poor rinsing on many washing machines on the market, [125] which can be a problem to people who are sensitive to detergents.

4. Air source heat pump - Wikipedia

   en.wikipedia.org/wiki/Air_source_heat_pump

   An air source heat pump ( ASHP) is a heat pump that can absorb heat from air outside a building and release it inside; it uses the same vapor-compression refrigeration process and much the same equipment as an air conditioner, but in the opposite direction. ASHPs are the most common type of heat pump and, usually being smaller, tend to be used ...

5. Home appliance - Wikipedia

   en.wikipedia.org/wiki/Home_appliance

   A home appliance, also referred to as a domestic appliance, an electric appliance or a household appliance, [ 1] is a machine which assists in household functions [ 2] such as cooking, cleaning and food preservation. The domestic application attached to home appliance is tied to the definition of appliance as "an instrument or device designed ...

6. Ground source heat pump - Wikipedia

   en.wikipedia.org/wiki/Ground_source_heat_pump

   These temperatures are typical of installations in the northern US. Standard ARI 325 ratings were intended for open-loop ground-source heat pumps, and include two sets of ratings for groundwater temperatures of 10 °C (50 °F) and 21 °C (70 °F). ARI 325 budgets more electricity for water pumping than ARI 330.

7. Heat pump - Wikipedia

   en.wikipedia.org/wiki/Heat_pump

   The hot, compressed vapor is then in the thermodynamic state known as a superheated vapor and it is at a temperature and pressure at which it can be condensed with either cooling water or cooling air flowing across the coil or tubes. In heating mode this heat is used to heat the building using the internal heat exchanger, and in cooling mode ...