Any particular reason for the 45*F outside temp. for heat pump balance point? Is it because of the climate in your location?
Originally posted by fat eddy
As the owner of a smalll HVAC shop I would say
Life expectancy is generally accepted as ten to fifteen years I wouldn't get hung up on that point. There are to many varibles to consider and probably won't make a big difference in either one you choose, I always felt that a Heat Pump in combination with a gas furnace, sequencing the Pump to run down to about a 45 OA temp then switching to gas heat was the best thing going. SEER ratings are just what they say they are if you want more eff. get a higher SEER rated unit.