Heat pumps are a super-efficient and powerful alternative to traditional central air conditioning systems. These systems support comfort year-round because they function as both heating and cooling equipment. During the summer, heat pumps extract heat from your home and send it outside. Then, during the winter the heat pump functionality switches, drawing warm air back into your house.
SEER Rating: Seasonal Energy Efficiency Ratio, or the ratio of the cooling output of an AC system during a typical cooling season, divided by the energy it uses in Watt-Hours. Like miles-per-gallon in your car, the the higher the SEER Rating the more cooling comfort you get per dollar spent on energy.
HSPF Rating: Heating Seasonal Performance Factor is a heating efficiency rating for heat pumps. HSPF is defined as the ratio of heat output over the heating season to electricity used, with units of BTU/watt-hr. The higher the rating, the more efficient the heat pump. A more efficient heat pump will result in less energy use and increased energy savings over the life of the system, compared to a less efficient heat pump.