University of Miami (Florida) Uses Aeroseal

University of Miami (Florida) Meets Safety Codes Using Duct Sealing

The University of Miami’s Cox science building was undergoing partial renovation. After testing dozens of fume hoods located in laboratories throughout the four-story building, the school’s environmental health and safety group found that many of the hoods were not providing sufficient exhaust. The reason: leaks in the connecting ducts and ventilation shafts.

Traditional duct sealing methods would have required a near demolition of the 50-year-old building. Instead, the duct sealing crew at AirMax Service Corporation used aeroseal duct sealing to successfully seal all nine targeted duct systems in less than two weeks. No demolition. No interruptions. 100% code compliance.

In Brief

  • Building: Cox Science Building
  • Location: University of Miami, Coral Gables
  • Mechanical: SmartAir Systems
  • Aeroseal Contractors: AirMax Service Corp.
  • Goal: Reduce duct leakage – get all laboratory fume hoods operating under code compliance.
  • Before Aeroseal: 1,000+ CFM of leakage
  • After Aeroseal: 215 CFM of leakage
  • Results: With 80% reduction of leakage, all twenty fume hoods were retested and successfully met safety requirements

The complex intertwining of internal duct systems and surrounding construction made locating and accessing leaks specific to targeted hoods impossible for traditional duct sealing methods. Short of demolition and rebuilding, the only viable option was an innovative new approach to duct sealing that uses an aerosol mist of sealant that finds and seals leaks from the inside of the duct.

The twenty target fume hoods were connected to rooftop exhaust fans via nine separate duct and ventilation shaft systems. One at a time, each duct system was blocked on both ends so that incoming air could only escape through leaks in the duct walls. The computerized aeroseal system was attached to each shaft and then a mist of microscopic particles of sealant was blown into the ducts’ interiors. Under pressure, the sealant is drawn to the individual leaks, where they bond around the holes until the leaks are completely sealed. A retesting by a third party TAB company confirmed what the aeroseal system indicated: all nine shafts properly and effectively sealed.


“There were few options available for fixing the problem. We could have completely demolished and replaced the existing duct system… or used aeroseal. The choice was a nobrainer. In the end, Aeroseal proved to be a highly effective – and cost effective – means of sealing the leaks and getting the fume hoods under safety compliance.”

Michael Lorion

“Research showed that aeroseal has been successfully used at a number of other universities, science laboratories and hospitals. But the bottom line is that there really was no other viable option for fixing this problem. I’m fascinated with new technologies like this so I was around for the actual application. It was great to watch the computer monitor as it tracked the sealing process. You can actually see the graph go down as the leaks are being filled. We were pleased with the results and I wouldn’t hesitate to recommend it to others.”

Gary Tarbe
Senior Project Manager
University of Miami (Florida)

About Aeroseal Technology

Before/After Aeroseal
  • Developed at Lawrence Berkeley National Laboratory in 1994.
  • Research for aeroseal technology was partially funded by the U.S. Department of Energy.
  • Aeroseal is the only duct sealant technology that is applied from the inside of the duct system. It is delivered as a non-toxic aerosol mist that seeks out and plugs leaks.
  • Aeroseal has proven to be 95% effective at sealing air duct leaks.

Share this post