We bought old house with Trane heat pump with electric auxiliary heat (no gas in the house but line goes in ~75ft from the house). Home size about 4000 sq ft but part (1200 sq ft) covered by second system. Heat pumps are not popular in IL so I can't find the pro. I was told that old system was converted from R22 to R410 but pipes sizing is incorrect; aux heat and coil looks original 1982. Our heater almost died and we are thinking of replacing the whole system - . Maybe it make sense to look at the other options (geothermal system, put gas in the house..)? In the winter electric bills just skyrocket... I'm looking for a pro who can recommend and install the new system based on appropriate sizing calculations.