Checking for and Fixing Leaky Ductwork in Minnesota Homes

Why Leaky Ductwork Is a Big Deal in Minnesota

​In Minnesota, where summers get sticky and winters are downright brutal, every bit of heated or cooled air counts. But if your ductwork has leaks, as much as 20–30% of that conditioned air can escape into basements, attics, or crawlspaces instead of reaching the rooms you live in. That means your HVAC system works harder, your utility bills climb higher, and your comfort takes a hit. At Air Comfort Heating & Air Conditioning, we don’t offer duct cleaning—but we do help homeowners identify and address duct leaks, which often make a bigger impact on comfort and efficiency.

Common Signs of Leaky Ductwork
If you’ve ever wondered whether your ducts are leaking, here are a few key things to watch for:

• Uneven heating or cooling: Some rooms feel like the Arctic, others like a sauna.
• Higher-than-normal energy bills: Your system is working overtime to make up for lost air.
• Dust problems: Leaks can pull in unfiltered air from attics or basements.
• Longer HVAC run times: Your furnace or AC runs longer but struggles to hit the thermostat setting.

DIY Ways to Spot Leaks
While a professional duct test is the gold standard, you can do some detective work at home:

• Check visible ducts in the basement/attic for disconnected joints or holes.
• Feel for air leaks with your hand when the system is running.
• Look for dirt streaks around seams—these often indicate escaping air.

Fixing Leaky Ductwork
The good news? Most small leaks can be sealed quickly:

• Mastic sealant or metal-backed tape (NOT standard duct tape) can be applied to joints and small holes.
• Insulation wraps help ducts in unconditioned spaces keep air at the right temperature.
• Professional sealing services ensure the whole system is tested and repaired for maximum efficiency.

Why Sealing Beats Cleaning
Many Minnesota homeowners ask about duct cleaning. While cleaning can help with specific allergy or debris issues, sealing leaks typically has a much bigger impact on efficiency, comfort, and energy bills. After all, what’s the point of cleaning ducts if half your heated or cooled air is still escaping?

When to Call Air Comfort
If you suspect your ductwork is leaking, don’t wait until your system is overworked this winter or summer. The Air Comfort team can inspect, identify, and fix leaky ducts to restore efficiency and comfort.

📞 Call us at (763) 753-6623 to schedule service.