I think this year is the year to replace my entire heat pump / heat exchanger in the house. My ass is in Iraq and my wife says it's not doing real well on those 80+ degree days. Can't imagine it's going to get any better. I think the system is about 12-15 years old. Anybody have any idea what this is going to cost me? 1700 sq ft single story with a FROG. I'm just across the VA border in Moyock, NC.