Air ducts are one of the most important systems in your home. They transport air from your furnace or air conditioner to each room in your home. If the ducts are poorly sized, poorly sealed, or poorly insulated, then they are likely contributing to higher energy bills.

Ducts that leak air into an attic or crawl space can add hundreds of dollars a year to your heating and cooling bills. Examine any exposed duct work to see if there are any visible gaps or holes. Duct mastic can be used to repair these areas and is more durable than any available tape and generally easier for a do-it-yourself installation. You should also check your registers to see if there are gaps between the duct work and the floor or ceiling. If so, then use caulk or spray foam to seal the gaps.

Did You Know?

In typical houses, about 20 percent of the air that moves through the duct system is lost due to leaks, holes, and poorly connected ducts.

Common Problems

  • Rooms are too hot or too cold
  • Dust covering surfaces near registers

Do-it-yourself: Tips for maintaining your duct work

  • Look for sections that should be joined but have separated and then look for obvious holes.
  • Use mastic or butyl tape to seal and holes.
  • Check to make sure any duct work in your attic or crawl space is properly insulated and sealed.


Our energy advisors can help you identify ways to make your home more energy efficient and connect you to a qualified trade partner that can complete the work for you.

There is no obligation and because we are a nonprofit, you can count on our advice to be unbiased.

Call 513-562-4831 or click below to schedule a free consult.

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