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Circulate basement air upstairs
I've got a 2-level house that has a single air handler in the basement level, as well as an air return on each level. The temperature in the basement level is 70 degrees while upstairs it's 80. Would it be a bad idea to block the upstairs return, forcing hot air down the stairwell into the basement return to get the air to mix? I'd also want to close the downstairs registers.
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