How high-efficiency AC systems & duct sealing eliminate hot spots.

Enjoy comfort, comfort everywhere!

We’re assuming that most of our loyal readers have already picked the low-hanging energy-saving fruit. And if you have, we hope you’re enjoying those easy money-saving wins!

If you’re new here, welcome! We’re going to dive into high-efficiency AC systems here, but be sure to check out “26 ways to boost your home’s energy efficiency in 2026” for some quick, fruitful recommendations for keeping your home comfy while saving money.

While ceiling fans, LEDs and smart thermostats are a great place to start your energy efficiency journey, summer in our seven-state region can overwhelm even the coolest of ceiling fans. 

If there’s a hot pocket in your hallway, a soupy spot in your kitchen or a heat wave in the family room, it may be time to take a peek at your cooling and ventilation systems. Don’t sweat it; uneven cooling in houses throughout our region is pretty common. Fortunately, there are options for tackling uneven temps. We’ll take a look at a couple of them — high efficiency AC systems and duct sealing — in this article.

What causes hot and cold spots in your home?

If your home is plagued with inconsistent temperatures from room to room, your first instinct may be to turn your thermostat down. However, if your AC isn’t properly sized to your home, running at peak efficiency or has reached the end of its lifespan, you may find yourself shivering in the bathroom and baking in the kitchen!

Here are a few reasons hot spots could be making you see red this summer: 

• Duct leaks may allow cooled air to escape into unconditioned spaces like attics, basements and crawlspaces before it ever reaches a room.
• Improper duct design may restrict airflow to critical areas of your home.
• Insulation gaps could allow heat to pour in around your windows or through walls, ceilings or floors.
• An aging AC unit may struggle to keep up with the demands of the day.
• Improperly sized units may “short cycle” and inadequately dehumidify your home.
• Closed or blocked vents could disrupt the balance of airflow throughout the system.

In many cases, it’s a combination of these issues working together to gang up on your comfort.

Not sure what’s going on in your home? Schedule a free Home Energy Assessment with a TVA-certified Home Energy Advisor to get a better idea of how your systems are interacting with your home… and impacting your comfort. 

Why do some rooms never feel comfortable?

Your heating, ventilation and air conditioning (HVAC) systems are designed to work together. When installed by a trained and vetted contractor, every vent, air return and section of ductwork does its part to achieve a consistently and evenly conditioned home.  

This fine-tuning of a home’s ventilation system is known as “air balancing.” Air balancing is the carefully calibrated process of distributing conditioned air evenly so that every room reaches its target temperature.

According to the good folks at This Old House, “Proper air balancing starts with a load calculation — known in the trade as a Manual J — to determine how much conditioned air each room actually needs based on the hottest and coldest days of the year … When the system is installed correctly with different-size ducts matched to each room’s needs, balancing is far easier.”

If your home has inconsistent temperatures or your upstairs is hotter than downstairs, call in the pros for an evaluation. You can find TVA-vetted contractors in your area through the Quality Contractor Network. It’s free to search, and it makes it easy to find a qualified HVAC contractor to help you get to the bottom of your “Why is one room hotter than the rest?” mysteries.

How high-efficiency AC systems and duct sealing improve airflow.

If your current AC unit is more than 10 years old, it may be working overtime just to keep up. Plus, older systems often lack that today’s high-efficiency air conditioners use to maintain steady, consistent comfort throughout your home. Such as variable-speed technology and precision controls.

Modern high-efficiency AC systems, especially ones that are rated at 15 SEER2 or higher, are built to do more than just cool. They modulate their output based on what your home actually needs at any given moment, rather than cycling on at full blast and shutting off suddenly. 

Steadier, even operation leads to more consistent temperatures and humidity levels throughout your home. 

For more on how humidity impacts comfort, check out “Humidity, heat and your home: How SEER2 15+ systems tackle our region’s tough conditions.”

The role of ductwork in uneven cooling.

We’re placing a lot of blame on old air conditioning units, but your ductwork may also have a hand in why one room is hotter than the rest. It’s easy to ignore what you can’t see — and that’s precisely why so many homes in our region have poorly sealed and insulated ducts. 

Here are a few symptoms of suspect ducts: 

• Rooms that stay warm even when the AC runs for hours.
• Stuffy or stale air in certain areas.
• Unusually high energy bills despite reasonable thermostat settings.
• Excessive dust, particularly near vents.
• Your AC is cycling on and off more frequently than it should.

ENERGY STAR notes that about 20% to 30% percent of the air that moves through your duct system is lost due to leaks, holes, and poorly connected ducts. Sealing ducts yourself, or finding a qualified contractor who can help, is one of the highest-impact improvements you can make for both comfort and efficiency.

Helping you stay comfortable and save money.

Your family deserves to be comfortable in every room, every day of the summer. TVA EnergyRight and your local power company are here to help with rebates on high-efficiency AC systems, duct sealing and more.

Rebates on duct repair, insulation or replacement

Duct sealing rebate

• Get a $300 rebate on professional duct sealing.

Rebates on high-efficiency air conditioning systems.

Air conditioning rebates:

• Get a $250 rebate on 15-16.99 SEER2 systems.
• Get a $400 rebate on 17 SEER2 or higher units.

Talk to a member of the Quality Contractor Network to find out which upgrades make the most sense for your home.