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Should You Close Vents in Unused Rooms?

Written by Luke Daugherty

Edited by Hannah Whatley

Last updated 03/30/2023

Serenethos/iStock/Getty images

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Key Points

  • Does closing vents in unused rooms help? The answer is no: In reality, it may hurt your HVAC system, lead to costly repairs, and cause other problems.
  • Closing vents for extended periods causes air pressure buildup, which can lead to air leaks, mold growth, and even increased radon levels.
  • To keep air flowing through your home and save on electricity bills, don’t close your vents more than 75%.
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