I had a new high efficiency heat pump put in about 2 years ago. The problem I have had from day 1 is that it does not really heat the house. It runs for hours and hours and never heats the house. We have 2200 sf house and the unit installed was a 3 ton york 15 seer. After going back and fourth with the contracter he suggested replacing the unit with a single stage heat pump.
My question is this
1. Is it possible that the unit I have is too small for the house?
2. How would I benefit from going to a single stage heat pump?
Is it possible this guy is selling me a bill of goods? He claims to have done a full calculation of the heating and cooling of the house and it is correct yet he is willing to change out the whole unit does that make any sense?