Should I keep my air vents open or closed to save money?
If you decide to close the vents, especially in the rooms you don’t use, you’re wasting money.
Each room has heating and cooling vents as well as cold-air returns to keep the air moving. When you close your vents, return ducts can also start pulling in outside air from improperly sealed vents, windows, and doors.
With too many air vents closed, your AC system works harder, and this decreases your efficiency. To increase the efficiency of your system and save money, keep your vents open.