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  2. 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 ).

  3. Seasonal energy efficiency ratio - Wikipedia

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

    A refrigeration cycle can be operated as a heat pump to move heat from outdoors into a warmer house. A heat pump with a higher SEER rating for cooling mode would also usually be more efficient in heating mode, rated using HSPF. When operated in heating mode, a heat pump is typically more efficient than an electrical resistance heater.

  4. Coefficient of performance - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_performance

    Less work is required to move heat than for conversion into heat, and because of this, heat pumps, air conditioners and refrigeration systems can have a coefficient of performance greater than one. The COP is highly dependent on operating conditions, especially absolute temperature and relative temperature between sink and system, and is often ...

  5. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    Heat transfer happens when heat moves from one area to another. It is an important and vital step in the process of cooling a space. hspf - (Heating Seasonal Performance Factor) Heating Seasonal Performance Factor is the measurement of heat efficiency over the period of a heating season. industrial refrigerator

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  7. How California eco-bureaucrats halted a Pacific Palisades ...

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    California’s eco-bureaucrats halted a wildfire prevention project near the Pacific Palisades to protect an endangered shrub. It’s just the latest clash between fire safety and conservation in ...

  8. How Long Does Compounded Semaglutide Last in the Fridge ... - AOL

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    Jayson Tatum scores 33, Celtics hold Heat to 34% shooting and roll to 103-85 win. Weather. Weather. USA TODAY. Ex-Ohio 911 dispatcher who admitted to starting forest fires gets 18 months in prison.

  9. Thousands of space heaters sold on Amazon recalled for ...

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    A space heater sold on Amazon is being recalled due to the potential to cause an "electric shock," resulting in a fire hazard, the U.S. Consumer Product Safety Commission (CPSC) announced Thursday ...