11/02/2026
The Truth About Closing Vents In Unused Rooms
Closing vents in rooms you do not use feels like it should save money. It usually does the opposite.
Here is what actually happens:
- Your system was sized for the whole house, not part of it
- Closed vents build up pressure inside the ductwork
- That pressure pushes air out through leaks and gaps
- Your furnace runs longer to hit the same temperature
- Closed off rooms can get cold enough to cause other problems
If certain rooms genuinely do not need heat, the fix is zoning or duct work, not shutting registers and hoping.
Call (801) 400-2422 to talk about ductwork solutions that actually balance your home.