The latest home we bought was all electric. I had it converted over to forced hot water,. For the second floor, the only option was to place an air handler in the attic. This, is after I installed a pull down stair case in an unused bedroom. At that, the air handler hardly made it up and through. It has heat and A/C lines to this handler and two drains that go outside.. Best move we ever made.Just finishing it's second year, this September. Best move we ever made. Condensor is almost a hundred feet away. All works well and I would do it all over again if I have to.