Your central heating and cooling systems air delivery system is a complex system of metal tubes in the walls, floors, and ceilings that carry conditioned the air from the furnace and central air conditioner to each room. If even one section of air duct is poorly sealed and leaks into unheated or cooled areas such as crawl spaces, basements or attics, it can greatly reduce the comfort throughout your home. The good news is you can effectively reduce air loss by sealing and insulating your air ducts.
Air Duct SealingEven if there are no visible gaps or holes, air under pressure is able escpae from the smallest of gaps. Sealing your home's ducts is an effective way to prevent this air loss, especially if the ducts are located in an unconditioned space such as an attic or crawlspace. If the supply ducts are leaking, heated or cooled air will be forced out and lost. In addition, unconditioned air can be drawn into return ducts through unsealed joints.
Aeroseal® duct sealing is the most effective way to prevent air leaks in your home's air delivery system. Aeroseal smart technology finds the exact amount of leakage in your air duct system and targets all of the cracks and holes – even the ones you can’t see and can’t reach.
Inspecting your air ducts1. Inspect the ducts for air leaks. Look for sections that should be joined but have separated. Also look for holes that may have been drilled for duct cleaning and not properly sealed.
2. While duct tape seems like the most obvious material to use for duct repair, duct mastic is a better choice for sealing seams and joints. While mastic is more durable than duct tape, it should not be used to cover gaps greater than ¼ inch. Larger gaps must be first bridged with a special mesh tape or a high quality heat approved tape. Butyl tape, foil tape, or other heat-approved tapes are also a good choice for repairing ducts.
3. If you're sealing or insulating air ducts in your basement, it could increase the risk of frozen pipes. To prevent pipes from freezing ensure that the basement walls are well insulated or use an electric heating tape on pipes.
4. If the basement is finished, ensure that there are both supply and return registers in every room.
5. In addition to sealing your ducts, it's important to ensure that objects are not blocking air registers, including furniture, rugs, drapes, etc.
6. Avoid closing too many air vents in your home, even if rooms are unoccupied. Doing so can make your furnace and air conditioner work harder and less efficiently.
Have questions about your home's air ducts? Give Superior Plumbing and Heating a call, we can help answer all your home heating and cooling questions.