i have heat pump thats not giving decent heat i retired from new jersey to virginia 4 years ago and from a traditional heating air conditioning system . now i have heat pump in new house and confused by it and how it really works . it is a 12 seer 4 ton unit in a 2440 sq. ft house with 2x6 stud walls but the house seems cold . i have added extra insulation in the attic but still chilly in here . the house was built in 2004 . is it just me or this heat pump or should i change it out for a traditional heating and air unit . HELP FREEZING IN AXTON VIRGINIA .