I have a small old house (1300sf) with elec baseboard heat & window A/C that I want to install heat pump heating/cooling. I have "open" basement so duct work should not be a major problem. I know just about nothing (heat=warm, A/C=cool). I was told by "Major Lumber Warehouse" that R-22 coolant system would be discontinued "soon". New systems would be R-410 & repairing R-22 would be "very" expensive. Also R-410 is only 13 SEER & above. He just walked into basement, no measurements, etc. He immediately gave prices for 2.5 ton 10 SEER & 13 SEER.
2nd contractor, similarly did no measuring, etc & recommended 3 ton 16 or 14 SEER.
3rd contractor measured, looked at rooms, etc & seemed more thorough, but he "brushed off" my R22/R410 questions. His estimate was for a 12 SEER (?? ton) system.
The 2nd & 3rd prices are almost identical. I tend to think that the 3rd system is more "designed" for my house, but can't judge if it's appropriate. Should R22/R410 be the determining factor? Can system be to big? Also, is flexduct off metal trunk line ok?