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Northeast ks | In one of my bigger two-story rental houses, I have a gas furnace in the basement that heats and cools the lower level. Then the attic has an air handler with heat strips that is feeding the upstairs rooms. That is the way to go in my opinion. Some other houses I have, there is just a furnace in the basement heating and cooling the whole house. With that setup, the upstairs and downstairs will be different temperatures due to heat rising. An 80,000 btu furnace would heat probably 1200 square foot, so I would think would be overkill for just an upstairs. | |
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Oversizing a home furnace
