Aeroseal Duct Sealing Technology
What the judges said…
“The documented reductions in both ductwork leaks and energy expenses were impressive. It is obvious that the results could go a long way in achieving a company’s sustainability goals.”
Aeroseal is a computer-controlled approach to duct sealing that works from the inside of a duct system to automatically locate and seal leaks. The system is applied to the inside of a building’s entire duct system via a non-toxic aerosol sealant mist. It does not coat the duct interior, but accumulates right around leaks. The company says that on average its product reduces annual energy costs by 20 to 40%.
Duct leakage is widespread, with average leakage rates of 15% or more found in 75% of existing commercial buildings, the company says. Hidden behind walls, under insulation, and obscured by infrastructure, commercial ductwork is largely inaccessible for manual sealing without major demolition. Once the ductwork is exposed, finding and sealing the leaks by hand can be a labor-intensive, trial-and-error process. These projects can take months.
Traditional commercial duct sealing methods include tape and mastic, and usually involve demolition and disruption for organizations. Aeroseal says its approach offers a non-destructive, economically feasible way to eliminate duct leakage in existing buildings. The computer-controlled Aeroseal system monitors the sealing process by measuring the ongoing leakage rate, ensuring the procedure is effective and alleviating the need for separate testing and retesting. A final report gets generated that shows before and after results to verify effectiveness. The project can be completed in one to three days, according to Aeroseal.
Aeroseal has been used on hundreds of commercial buildings in the United States. Studies show that Aeroseal is 95% effective at sealing entire duct systems, and up to 60% more effective than traditional methods, the company says.
In Caldwell, New Jersey, Aeroseal was used to reduce energy usage at the Carlyle Towers high-rise apartment building. By sealing leaks in the building’s 25 duct systems, engineers could replace 25 of the building’s 300-watt rooftop fans with 140-watt fans and reduce heating energy usage by 16,000 therms (EC) per year for a total annual savings of $26,000.
Aeroseal was also used to obtain similar results for New York’s MetLife Building, the science building at Harvard University, the Chicago Hilton Hotel, the John Muir Medical Center in Walnut Creek, California, the LA Unified School District, the new US headquarters for Hyundai, and hundreds of other commercial properties. Most recently the technology was applied to the Cornell Tech building, which is the world’s largest passive house building.