Duct Sealing

You can see a water leak, but an air leak is invisible.  Just because you can’t see air leaks in your home, don’t think they aren’t causing you problems or costing you money.

What are duct leaks?

In houses with forced-air heating and cooling systems, ducts are used to distribute conditioned air throughout the house. In a typical house, however, about 20 percent of the air that moves through the duct system is lost due to leaks, holes, and poorly connected ducts.

Air Duct Animation Video:

Check out this video to learn more about your duct system:

If you have 20% duct leakage, approximately 20% of the hot or cold air you are buying is being pushed out of the ducts and into the attic.  This can also mean you are sucking hot or cold attic air into the duct system on the return side of the air handler. On new, high performance homes, you can achieve less than 2-5% duct leakage. On older homes (especially with metal ducts), you could have duct leakage OVER 40%.

How much are your duct leaks costing you?

For every 1% loss you have, you will have at least 1% capacity and efficiency loss, which could mean 1% higher cost on your utility bills.  We have seen up to a 1:10 ratio, which means that you can lose up to 10% capacity and efficiency for every 1% of leakage and pay up to 10% more on your utility bills.  If you have an older home with over 40% leakage, some serious cash is leaking out of your house every month!

How do duct leaks affect indoor air quality?

Not only do leaky ducts cause higher energy bills, they cause most homes to go under negative pressure.  This means that if there is 20% leakage, then an equal amount of air must be “made-up”.  Make up air usually enters the home through windows, doors, can lights and any other “holes” in the home. Air quality can suffer since outside air is often dusty, dirty, pollen laden or humid.  Dust on windowsills or stains on carpet around the baseboards indicate outside air is being pulled into the home.

Signs you have leaky ducts in your home:

  • High energy bills
  • Excessive humidity levels
  • Uncomfortable rooms that are hard to heat or cool
  • Musty odors and other indoor air quality (IAQ) isssues
  • Dust on windowseals
  • Stains on carpet around the baseboards
  • Ducts located in an attic, crawlspace, or the garage
  • Tangled or kinked flexible ducts in your system


Ways to seal and repair your ducts:

We are your duct sealing service experts.  If you would like more information about duct sealing services or if you would like to find out how much leakage you have at your home, give us a call.  We would be happy to help you.  We service Greenville, Spartanburg, Hendersonville, Oconee, and surrounding areas.



Still have questions? Send us a message and we’ll get in touch with you.

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