Heating Capacity Ratio: The heating energy the heat pump can produce at 5°F divided by the heating energy the heat pump can produce at 47°F. This ratio measures the degree to which a heat pump is able to provide heat in very cold weather. The 70% minimum requirement for cold climate heat pumps (for those installed in the north) ensures that less backup energy is needed to provide continuous conform.
The Coefficient of Performance (COP) at 5 degrees Fahrenheit is greater than 1.75 at maximum capacity. COP is a performance rating of how effective a heat pump is at transferring heat relative to the electricity it consumes.
Seasonal Energy Efficiency Rating (SEER) measures the efficiency of the cooling process in air conditioners and heat pumps. The higher the SEER, the more energy efficient the system.
HSPF2, or Heating Seasonal Performance Factor, measures a heat pump’s overall energy efficiency throughout the entire heating season (fall and winter). The higher the HSPF2 rating, the more efficient the heat pump.
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