Do You Save Money When You Close the Upstairs Air Vents?
It seems reasonable to close the upstairs air vents in summer; after all, the upstairs doesn’t get much use, and you want the AC to only cool where it’s necessary. But this does more harm than good, as we’ll show below. Don’t Close Vents to a Single-Speed AC It’s true that some ACs are variable-speed and come with zoning controls that allow you to disperse less air to unoccupied rooms. However, a single-speed air conditioner is meant to cool a precise square footage of living space, and if you reduce that square footage by closing vents, it won’t cool as...
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