I had a pro install a new natural gas, forced air Heil 150000 btu in my 1971 Alexandria Virginia colonial basement. He hooked it up to the existing duct system, which was installed on the far left side of the basement. The furnace he replaced was the same size, he said.
He never balanced the system and now no longer returns my calls. On the left side of the house the force of the air is strong and the house gets warm. On the right side of the house, (the footprint is 36 wide by 30 deep), it stays cold or at least a solid 10 degrees below the other side. On the second floor the left side is warm and the right cold, as below. The pro says balancing the system is not part of the job. Is this standard practice?
I have tried to balance it myself, but simply closing and opening the registers does no good at all. Two other pros have looked at my ductwork and just scratched their heads and left. One suggested that I install a fan on the round 6inch duct that goes 30 ft. across the basement to feed the dining room above and dual fans on the rectangular trunk lines that go about 15 ft. across the basement before turning up into the walls that feed the rooms above. Does anyone have any experience with installing such fans? How can I find somone who has experience with such a situation?