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Aeroseal Duct Sealing

Aeroseal Duct Sealing in Seattle

Improve Efficiency & Comfort with 
Aeroseal Duct Sealing Technology

Home building standards have improved the integrity of ductwork in the last 15 years, but it’s estimated that leaky ducts still cost American homeowners $25 billion dollars each year. Fortunately, there is a simple way to effectively seal ductwork, keeping hot or cold air inside your home and dollars inside your wallet.

How Does Aeroseal Work?

Aeroseal is a technology that works from the inside out, moving through the entire system of ductwork, filling minor holes and leaks as it goes, similar to Fix-A-Flat for punctured tires.

  • Ducts are sealed off and air is pumped into the ductwork, pressurizing the system.
  • Aerosolized polymers are released into the vents.
  • Any small leaks that exist begin to release air, pulling the aerosolized polymers towards the leaks.
  • The polymers build up in cracks and crevices, filling all holes from the inside.
  • Throughout the process, technicians monitor the reduction in duct leakage in real-time.

Noticeable & Measurable Improvements

Brennan Heating & Air Conditioning runs a duct leakage test before and after every duct sealing. The resulting Certificate of Completion quantifies the amount of air leaking from a home’s ductwork. This test-in, test-out approach ensures measurable returns on each homeowner’s investment. While improvements in the 15-20% range are most common, Brennan has been able to reduce leakage from 40% down to less than 5%!

Improve Indoor Air

Ductwork resides in basements and crawl spaces, where dust and musty odors can infiltrate a home through duct leaks. Poor ductwork can cause health issues as dirty air circumvents filters located within HVAC equipment. Homeowners with ductwork that has been sealed with Aeroseal describe their indoor air as odorless and notice decreases in dust accumulation.

Rebates & Tax Credits Available for Aeroseal

Qualifying homeowners who seal their ducts with Aeroseal can earn up to $1,250 in rebates. Talk to your Brennan comfort specialist for more details.

    Brennan Means Quality
    “Detail-oriented and their technicians spend time teaching you the system. I also can’t believe they also came back the next day to caulk a tiny hole they made. You get quality with Brennan.”
    - Marcin N.
    Two Thumbs Up!
    “Bryan and Michael arrived early as I requested and worked hard to clean the furnace vents, returns and ductwork including the dryer vent. Our daughter had recently used Brennan and recommended the company. I am very happy with the results. I felt the price”
    - Janie H.
    Two thumbs up!
    “Bryan & Michael arrived early as I requested and worked hard to clean the furnace vents, returns, and ductwork, including the dryer vent. Our daughter had recently used Brennan & recommended the company. I am delighted with the results.”
    - Janie H.
    Always Happy With The Service From Brennan
    “We had Dakota out yesterday for routine maintenance, and he was excellent. We run our heat and ac often. I feel confident knowing Brennan sends out great service to help us and to keep it running well.”
    - Nichol L.
    My New Go-To Company
    “Excellent and efficient service. Brayan Rodriguez and Giovanni did a great job. Brennan will be my go to for services needed”
    - Diane V.
    Amazing Experience
    “We had our ducts cleaned. The Brennan employees arrived on time and did a great work. They were respectful, wearing shoe coverings, courteous, and professional in their work. I would not hesitate to use their services in the future.”
    - Bryan S.
    Above & Beyond
    “Brennan guys are the read deal. They showed up on time, were very professional, and completed on time and on schedule. They definitely know what they are doing. I would recommend this company to others. Excellent value for money.”
    - Serghei A.
    Great service!
    “The technician arrived first thing in the morning. Dakota was friendly, knowledgeable, and repaired our air conditioning system within an hour. He explained in detail what the problem was and answered our questions well.”
    - Barbel G.
    • Smarter, Safer, & More Efficient
      From high-efficiency HVAC installs to LED lighting upgrades and surge protection, we’re here to improve the way your home feels—and functions—year-round.
    • Award-Winning Care
      Multi-year Angie’s List Super Service Award winner with an A+ BBB rating, Brennan is Seattle’s trusted partner for top-tier heating, cooling, and electrical services.
    • Integrity Meets Innovation
      From certified energy consultants to licensed electricians, our team brings you forward-thinking solutions backed by time-tested values of honesty, reliability, and expert care.
    • Trusted Since 1987
      With decades of experience and thousands of satisfied customers, Brennan delivers worry-free heating, cooling, and electrical solutions with service you can count on.
    Your Comfort is Our Commitment

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