SEER- Seasonal Energy Efficiency Rating: Higher SEER means more efficient air conditioning on your heat pump.  Our market code minimum is 14 SEER.  Look for a 15 SEER or higher if you want an efficient heat pump!  HSPF – Heating Seasonal Performance Factor: The higher the HSPF, the more efficient the heat pump.  Our market code minimum is 8.2 HSPF.  Look for a 9 HPSF or higher if you want an efficient heating system.  Contrary to common sense in our hot humid climate, a better HSPF will yield more annual savings than a better SEER.  AFUE – Annual Fuel Utilization Efficiency: The higher the AFUE rating, the more efficient the furnace.  Our market code minimum is 80 AFUE.  Look for a 92 AFUE or better if you want an efficient furnace!