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2. 5 Things to Consider Before Buying a Heat Pump - AOL

   www.aol.com/5-things-consider-buying-heat...

   Sep. 29—(Family Features) If you're like many homeowners who are considering ways to achieve greater energy efficiency, cut costs long term and reduce use of fossil fuels, replacing your gas ...

3. Coefficient of performance - Wikipedia

   en.wikipedia.org/wiki/Coefficient_of_performance

   The COP usually exceeds 1, especially in heat pumps, because instead of just converting work to heat (which, if 100% efficient, would be a COP of 1), it pumps additional heat from a heat source to where the heat is required. Most air conditioners have a COP of 3.5 to 5. [3]

4. Are heat pumps the key to accelerating the energy transition?

   www.aol.com/news/heat-pumps-key-accelerating...

   Story at a glance Heat pumps operate similarly to refrigeration systems such as air conditioners (ACs), with the only difference of producing hot instead of chilled water and/or air, and offering ...

5. Heating seasonal performance factor - Wikipedia

   en.wikipedia.org/wiki/Heating_seasonal...

   Heating seasonal performance factor (HSPF) is a term used in the heating and cooling industry. HSPF is specifically used to measure the efficiency of air source heat pumps. HSPF is defined as the ratio of heat output (measured in BTUs) over the heating season to electricity used (measured in watt-hours). [1] [2] It therefore has units of BTU ...

6. 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]

7. Heat pump - Wikipedia

   en.wikipedia.org/wiki/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 ...