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What You Need to Know About Duct Leakage

How often have YOU thought about your home’s air ducts since you moved in? If you’re like many homeowners, the answer is “not much” or “not at all.” They’re there, they do their thing, and that’s it… or is it? 

Contrary to the popular belief that the air ducts in your house are “out of sight, out of mind,” these systems do a lot of work behind the scenes to keep you comfortable. In fact, if you are experiencing HVAC issues and you’re not considering your ductwork, you could very well be missing the crux of the issue. 

Leaky ducts can compromise your comfort, cost you a fortune in energy bills, and increase strain on your HVAC units, making it essential to find and fix duct leakage whenever possible. In this guide, our HVAC experts will explain a little bit about how to tell if ductwork is leaking, how to find air duct leaks, and how duct sealing can keep your heated and cooled air where it belongs — inside your house. Let’s get started!

What is Ductwork?


Your duct system is a complex network of tubes connected to your heating or air conditioning systems. These tubes help carry air to different rooms in your house. Ductwork is typically made of sheet metal or fiberglass and located in walls, floors, and ceilings.

Problems Caused by a Leaky Air Duct System

If there are any cracks, holes, or gaps in your heating and air conditioning duct system, you might run into trouble. Here are a few issues that can be caused — or made worse — by leaky air ducts:

Illustration of airflow before Aeroseal installation
Health Concerns and Indoor Air Quality

Cartoon icon of dust and allergens

Besides just the loss of conditioned air, leaky ducts can result in negative air pressure. This actually pulls in dust, allergens, and other contaminants from the attic, basement, or crawl space and spews it into your living areas via your HVAC system. This can also lead to clogged air filters, which can worsen the air quality problems in your home and compromise energy efficiency. In addition, condensation buildup due to holes and gaps can result in ductwork leaking water, not just air. As a result, un-sealed ducts can become a breeding ground for mold, mildew, and other toxic fungi.

Hot and Cold Spots

Fix hot and cold spots

A leaky ductwork system can contribute to temperature inconsistency, causing hot and cold spots in certain rooms throughout your house. Repairing your duct leaks or sealing all your ducts can help eliminate this problem by improving the airflow in every room.

High Energy Bills and Shorter System Life

Cartoon illustration of paper money bills

HVAC system inefficiency is one of the most common problems caused by a ductwork leak. When the air from your HVAC system isn’t going where it’s supposed to, the system has to work harder. Even a small amount of energy loss can cost you a fortune in utility bills or result in the need for premature HVAC system repair, so we recommend dealing with duct leaks ASAP.

Energy Conservation

Two leaves representing environmentally green

When you have a leaky duct system, you may be losing as much as 40% of the conditioned air moving through your home (or even more if you don’t have adequate insulation in your attic, garage, or crawl space). This equates to approximately 20% of the energy you’re paying for each month — and that means you’re using 20% more energy than you need to be. Having your ductwork sealed via Aeroseal or other methods can save that 40% of airflow and 20% of energy. Keep the planet greener and save on utility bills at the same time!

Safety

Cartooon illustration of air flowing out of a register

If your heating and cooling system relies on natural gas or you have natural gas lines in your home for other reasons, this means that your appliances (such as your stove, dryer, water heater, and furnace) give off combustion gasses as they run. These gasses – including carbon monoxide, which can be deadly – enter your home’s duct system through their individual ventilation processes. If your ducts leak, those gasses can permeate the air you and your family breathe due to an effect known as “backdrafting.” While you may have a carbon monoxide detector in your home to warn you when backdrafting occurs and these gasses reach dangerous levels, it’s a better idea to prevent this buildup by sealing leaking air ducts.

What Can You Do?

Here are some things to consider for making sure your home’s ductwork is in working order.

  • Don’t Skip HVAC Maintenance
  • Change your furnace or cooling system’s filter every time you upgrade your duct system or every three months, whichever one comes sooner. Filters clogged with dust and dirt can compromise indoor air quality, which can aggravate allergies. Higher-quality filters can boost energy efficiency and help you save on bills.
  • Show Your Air Ducts Some TLC
  • Straighten out any kinks, tangles, or crushed areas in your ductwork. Duct leaks occur most commonly in unconditioned spaces where ducts are exposed, such as basements, attics, and crawl spaces. Seal air leaks and connection gaps with duct tape or mastic tape, and have professionals repair any damaged or disconnected ducts. Also ensure that all registers and grills are sealed flush and tightly to the ducts, and move furniture away from vents to ensure conditioned air can circulate properly. If you notice an especially damaged or leaking duct, or notice water dripping from ductwork in the basement, attic, or crawl space areas, call a professional ASAP for duct cleaning services. We’ll determine the source of the leak and seal the broken ductwork to ensure that your conditioned or hot air can keep you comfortable.
  • Schedule an Assessment 
  • The common signs of leaking ducts aren’t hard to catch, but the best way to eliminate all leaks in your ductwork is by hiring experts. Have an HVAC technician visually inspect and physically test your entire system, from the lowest level of your home up to the attic. We will also test for backdrafting with a combustion safety test. It’s common for systems to have air return ducts that are too small for the square footage of the home, so remember to ask your contractor to determine if your ductwork system’s supply and return air balance is adequate. Finally, we’ll check your home’s airflow after duct sealing is completed to ensure that all leaks have been eliminated.
  • Invest in Duct Sealing
  • Duct tape and proper HVAC maintenance can go a long way, but the most cost-effective way to keep conditioned air inside your home where it belongs is by sealing ducts professionally with the help of ductwork experts. Our experts will first clean your ducts and use equipment to create positive pressure. Then, we’ll use Aeroseal (a sophisticated aerosol sealant) to seal each duct, eliminating any areas where air can leak out (or dust, dirt, and dander can leak in). Aeroseal not only protects your home against temperature inefficiency, but also keeps your indoor air healthier by sealing out contaminants. 

Fight Back Against Leaks With Help From Our Air Duct Experts!

If you need professional assistance dealing with duct leaks in your home, call All American Heating today. Our experts know exactly how to check AC ducts for leaks and recommend the best possible solutions, including state-of-the-art technology like Aeroseal. We also offer high-quality air duct cleaning services to keep your home feeling fresh and clean. So don’t let an air leak cost you a fortune or cause a dust-filled living space. 

Call us today and we’ll find and fix duct leaks for good!

Sources:
https://yellowbluetech.com/2019/04/01/how-duct-leakage-causes-money-and-energy-loss/
https://www.energy.gov/energysaver/minimizing-energy-losses-ducts
https://en.wikipedia.org/wiki/Duct_leakage_testing
https://www.energystar.gov/campaign/heating_cooling
https://www.energystar.gov/sites/default/files/asset/document/ES_Duct_Sealing_flyer.pdf

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