Closing your air vents to force more cool air into the areas you use most may seem like a smart way to save energy. Unfortunately, that’s not how most central air conditioning systems work and could reduce efficiency and comfort while increasing wear on your equipment. Our team at JMS Air Conditioning and Heating has helped Los Angeles homeowners solve airflow issues since 1993. Before you start shutting vents around your house, here’s what you should know.
Closing Air Vents to Save Money
For most homes, you usually won’t save money by closing your vents. Central HVAC systems are designed to move a specific amount of air through your ductwork. If you close off several supply vents, the system will still try to push the same amount of air, creating higher pressure inside the ducts. Instead of lowering energy use, your air conditioner may have to work even harder to maintain the temperature you want.
What Happens When You Close Too Many Air Vents
Closing multiple vents can cause extra pressure to force cool, conditioned air through small duct leaks that may have gone unnoticed for years. You end up wasting cool air before it ever reaches your living spaces, especially in older Los Angeles homes with aging ductwork in attics or crawlspaces. You end up with poor cooling performance and potential system damage.
Why Are Some Rooms Hotter Than Others?
If one room is always warmer than the rest of your home, closing off vents in other rooms won’t solve the real problem, which could include:
- Leaky ductwork
- Poor duct design
- Dirty air filters
- Blocked return vents
- An incorrectly sized HVAC system
- Sun-facing rooms that gain more heat during the day
Scheduling an inspection with our team to identify the actual problem helps improve comfort without placing unnecessary strain on your air conditioner.
The Return Air Vent
Most homeowners know where the vents that supply cool air are, but they don’t always understand the purpose of their return air vents. These vents pull warm air back into your HVAC system so it can be cooled again.
Return vents should never be closed or blocked by furniture, rugs, curtains, or storage bins. Restricting the return airflow will reduce your system’s efficiency, increase strain on the blower motor, and make it harder for your AC to cool your home.
You can improve airflow in your home by replacing dirty air filters, keeping supply and return vents clear of furniture, and making sure interior doors aren’t blocking airflow between rooms. Bookcases, oversized sofas, and storage cabinets can also restrict airflow without completely covering the vent, which makes some areas of the home harder to cool while forcing the system to run longer.
Keep Your AC Running Efficiently All Summer
Closing off your air vents may seem like an easy way to cut cooling costs, but it can create more problems than it solves. A well-maintained HVAC system with balanced airflow is a far more effective way to improve comfort and efficiency.
Contact JMS Air Conditioning and Heating today for AC service, repairs, or maintenance in Los Angeles, CA.
