My gas bill is getting more and more outragous. I used 120 therms last month and it cost $149.00 (only $5 was the base monthly fee), so $144 went to buy the gas. That is about $1.20 per therm. My electric rate is .06 cents per KWH. I live in east Tennessee in a 3200 sq. ft. 2 story home which is 5 years old. Well insulated brick home. I am debating on replacing the units with heat pumps as I am told theat gas will only go up, up, up going forward. As I stand now, would it be cost effective to replace my five year old gas furnaces with heat pumps? Thank you.