When it comes to saving energy and cutting down utility bills, many homeowners try to outsmart their HVAC system. One of the most common strategies? Closing air vents in unused rooms.
At first glance, it seems like a logical move—why heat or cool a space you're not using? But while it may feel like you’re helping your system work more efficiently, the reality is quite the opposite.
Why Closing Vents Is a Bad Idea
Modern HVAC systems are designed to distribute air evenly throughout your home. When you close a vent in one room, you're not stopping the system from producing that conditioned air—you’re just redirecting where the air can’t go. This creates increased air pressure in the ducts, which leads to several issues:
Strain on the blower motor
The added pressure forces the blower to work harder, potentially reducing its lifespan.
Reduced efficiency
Your system has to work overtime to compensate, which can actually increase your energy usage instead of lowering it.
Imbalanced airflow
This can create hot and cold spots in your home, making it less comfortable overall.
Duct leaks
The added pressure can cause or worsen leaks in your ductwork, resulting in further inefficiencies.
The Best Practice: Keep Vents Open
Instead of closing vents, let your HVAC system do what it was designed to do. If you’re looking for ways to save energy, consider these alternatives:
Install a smart thermostat
Upgrade to a programmable thermostat to optimize temperature settings based on when you’re home.
Seal ductwork
Seal and insulate your ductwork to improve overall efficiency.
Zone your HVAC system
Zone your HVAC system if you consistently use only parts of your home. Zoning allows for better control without compromising system performance.
Schedule maintenance
Regular maintenance ensures your system is operating at peak efficiency.
Final Thoughts
It may be tempting to close vents in unused rooms, but it’s not the energy-saving hack it seems to be. Doing so can lead to costly repairs and higher energy bills. Keep your vents open and talk to an HVAC professional about better ways to manage comfort and efficiency in your home.
