Aeroseal Duct Sealing Technology Featured On PBS's This Old House

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Highly Effective Sealing Technology Used To Maximize Home Energy Efficiency And Increase Indoor Air Quality For Program’s New Home Construction Project

Sealing duct system with Aeroseal

Duct Sealing From The Inside

By sealing from the inside, you can easily find and seal all the leaks.

The use of aeroseal technology to improve the energy efficiency and indoor air quality of a newly constructed home was featured on the latest episode of PBS’s This Old House. In show #22 of this season’s series, titled “400 Years of Home Technology”, the show’s host Kevin O’Connor talked with duct sealing expert Jim Moulison of Bright Star Heating Supply Company about the advantages of using aeroseal technology for both existing homes and new construction projects.

During a demonstration of the technology, Moulison created a large hole in the ductwork and covered it with a piece of metal screen. He then showed how the aerosol-based duct sealing technology worked from the inside the ductwork to seal the hole. Once the sealing process was completed, a close examination of the screen showed that a solid patch of sealant had formed across the entire exposed surface.

“By sealing from the inside, the Aeroseal system can easily find and seal all the leaks,” said Moulison. “While traditional duct sealing typically takes a day or more to complete, aerosealing can be done in just a few hours. More importantly, the computerized system is highly effective. You can actually watch a computer monitor show the results as the sealing process is taking place. A computer-generated printout at the end of the process provides official documentation of the before and after results.”

During the featured demonstration, O’Connor noted that the aeroseal technology quickly eliminated all the leaks in the ductwork.

“There’s nothing better than zero percent leakage,” said O’Connor.

The full episode of This Old House #22 featuring the use of aeroseal technology can be found for viewing at

About Aeroseal Duct Sealing

Aeroseal technology is a duct sealing solution developed at Lawrence Berkeley National Laboratory with funding from the U.S. Department of Energy, The Environmental Protection Agency and others. Aeroseal works from inside the ductwork to seal leaks, making it easy to administer and highly effective at sealing all leaks in the ductwork, including those hidden behind walls, in tight attic spaces or under insulation. Aeroseal sealant is non-toxic and has been used in hospitals, schools, apartment buildings and other facilities where health is of paramount concern.

For more information or to locate an Aeroseal dealer near you, visit or call (937) 428-9300.

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