Q: What is a SEER rating?
Q: What is HSPF?
A: HSPF is an abbreviation for Heating Seasonal Performance Factor. It is the most commonly used measure of the heating efficiency of heat pumps. (The cooling efficiency of a heat pump is measured by its SEER) HSPF is a heat pump's estimated seasonal heating output in BTUs divided by the amount of energy that it consumes in watt-hours. New heat pumps manufactured after 2005 are required to have an HSPF of at least 7.7.

Q: How often should I have my equipment serviced?
Q: What Size Heating and Air Conditioning System Do I Need?