HSPF stands for Heating Seasonal Performance Factor and measures the efficiency of a heat pump over the fall and winter seasons. HSPF2 is an updated version of HSPF set by the Department of Energy (DOE) that goes into effect Jan. 1, 2023. The DOE created HSPF2 after refining HVAC system testing procedures to more closely mimic real world conditions.
Starting Jan. 1, 2023, the Department of Energy will require all split system heat pumps to have an HSPF2 rating of 7.5 or higher, and all single-packaged heat pumps to have an HSPF2 of 6.7 or higher. The best HSPF2 rating for your heat pump depends on a number of different factors, like home size and climate, so be sure to talk to your American Standard Customer Care Dealer™ before investing in a system.
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SEER measures the efficiency of a heat pump or air conditioner over an entire cooling season. The higher the SEER, the more efficient the system.
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