Extra Edition / Web Exclusive

Sealant Keeps Project on Track After Ventilation Shafts Fail Pressure Tests

CENTERVILLE, Ohio — Aeroseal duct sealant helped Ohio State University’s (OSU’s) William Hall Complex Extension project save considerable expense. When tests indicated that the new building’s ventilation shafts had unacceptable leakage, engineers faced the possibility of having to tear down many of the new walls and manually seal each of the leaks. The unexpected work would have had a significant impact on project costs and set the completion date back by half a year or more.

Fortunately, someone on the engineering team had heard about Aeroseal’s sealing technology. With this solution, workers were able to seal all 19 shafts of the six-story dormitory building in less than two weeks, saving costs and allowing the construction schedule to remain on track.

“After looking at the daunting possibility of redoing much of the finished construction work, finding out about Aeroseal was a huge relief,” said Ruth Miller, senior project manager, OSU. “The shafts were constructed of three layers of fire-rated drywall, so fire couldn’t get through, but the leaks meant that smoke could. To pass fire code and ensure the safety of building occupants, the leaks had to be sealed. Aeroseal did the trick.”

Originally developed at Lawrence Berkeley National Laboratory, the sealing technology, offered by Aeroseal LLC, seals leaks from the inside of duct systems and ventilation shafts, to more easily treat otherwise hard-to-access leaks. Applied to the interior as a non-toxic aerosol mist, in this application the mist was pumped throughout each ventilation shaft. The Aeroseal particles would stay suspended in air until they came across a leak. There the particles would accumulate around the hole and bond to each other until a permanent seal was formed around the leak.

“All of the vertical exhaust shafts throughout the building initially failed the pressure tests that measure leakage,” said Fred Bressett, product specialist for Aeroseal. “When we finished, nine days later, each shaft passed with flying colors. We didn’t have to tear into the walls and we were able to keep the project on schedule. Most importantly, the ventilation system is now working as it should, reducing the risks associated with fire hazards, and improving ventilation efficiencies.”

“Aside from decreasing fire safety, the leaks would have had a direct negative impact on the day-to-day ventilation of each of the building’s dormitory suites,” said Miller. “They would have also increased the building’s energy usage and operating costs, keeping the building from attaining its intended LEED Silver energy efficiency certification.”

For more information, visit www.aeroseal.com.

Publication date: 7/23/2012

Did you enjoy this article? Click here to subscribe to The NEWS Magazine

You must login or register in order to post a comment.



Image Galleries

2015 HARDI Fly-In

Highlights from HARDI's Congressional Fly-In in Washington, D.C. Post date: May 28, 2015.


NEWSMakers: Kevin Conrad
Kevin Conrad, president, Kevin Conrad Heating and Cooling Inc., Nantucket, Massachusetts, breaks down working in the New England climate, the benefits of insulation foam, and more.

More Podcasts


NEWS 07-06-15 cover

2015 July 6

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe

Online Reviews

Do you track online review sites like Yelp to look for comments on your company’s performance?
View Results Poll Archive


2015 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

More Products

Clear Seas Research


Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.


Magazine image
Register today for complete access to ACHRNews.com. Get full access to the latest features, Extra Edition, and more.


facebook icontwitter iconyoutube iconLinkedIn i con