Poorly sealed or insulated air ducts in your home will contribute to higher energy bills.
Air ducts branch into a network of tubes in the walls, floors and ceilings that carry the air from your furnace to each room. According to the U.S. Department of Energy, ducts that leak heated air into unheated spaces can add hundreds of dollars a year to heating bills.
Seal ducts to prevent leaks. If supply ducts are leaking, heated air can be lost through unsealed joints and unconditioned air can be drawn into return ducts. Consider consulting a contractor unless doing minor duct repairs.
Minor duct repair tips:
- Check ducts for air leaks. Look for obvious holes or sections that should be joined but have separated.
- Seal ducts with mastic, butyl tape, foil tape or other heat-approved tapes that have the Underwriters Laboratories (UL) logo.
- Insulating ducts in the basement will make it colder if basement walls are not also insulated. Consider insulating both.
- Unsealed ducts in your attic and crawlspace lose air and uninsulated ducts lose heat - wasting energy and money.