Mr. Kelso installed an entirely new furnace and a/c unit in a house we bought in Norman. He designed a zoned system that heats and cools the upstairs and downstairs separately using only one condenser, which makes the whole thing much more efficient. He had to search far and wide to find a bypass damper small enough to fit in the tight space we had, but he got it and had our system up and running in no time. He also came back two months later at no charge and adjusted the bypass damper to allow for better cooling upstairs as it got hotter outside. I would highly recommend him to anyone in the area. Great job John!