I had someday planned on getting a heat pump installed in my house to both heating the AC. I currently have 2 gas fireplaces at each end of the house, and that is fine except the center of the house (I have a rancher) stays chilly, and that is where the bedrooms are. I had my crawl space poured with concrete so it was good to go. Today I called a place for a Trane heat pump and was asking and about getting a estimate done (heat pump plus all the ducting) only to find out that it cannot be installed as my house is only 100 amp service. I never thought about the power side. Apparently it needs a bare minimum of 150 amp service, ideally will have 200 amp. And to upgrade my service is about $3000.00. Wow, that really bumps up the cost for this, so this heat pump idea may not happen. What about a gas furnace? What power service do they typically require? Thanks.