I have a 2600 sq ft house that I need to renovate. The house has issues, and I'm starting in the basement. The house has had two additions. The newer addition has a gas furnace, the original house has electric baseboard heat. In redoing the basement I want to make the heating/air efficient. My electric bills are out of this world. I've had two heating/air guys in and they both tell me something different. I'm a single mom taking care of an 89 year old mother, with no construction experience. I've been taken advantage of by contractors in the past. I would like some help on the furnace dilemma. The existing gas furnace is located in the garage, next to the basement...not in the center of the house (3rd) and towards the back. (main house sits over the garage and basement...on a hill) One guy said I need a second furnace and is locating it towards the back/end of the basement (back, left side of house). This will heat/cool one end of the house. A second guy also said I need to have a 2nd furnace but he is locating it in the middle of the basement, which will supply the main trunk lines through the center of the original house. The existing furnace will just heat and cool 1/4 of the house...the newer addition. So....I'll need two furnaces, 2 air conditioners. Where should a furnace be located? How do I really know if I need two furnaces? If the furnace is located towards the back 1/4 of the house will the air make it to the front of the house? The width of the house is about 36 ft. Oh, and My mother keeps her bedroom at about 85 in the winter. I appreciate any thoughts!!!!