CENTERVILLE, Ohio — A 23-story high rise apartment building in Camden, N.J., has reduced its utility bill $37,000 a year by replacing dampers and sealing leaks in the building’s exhaust duct system with Aeroseal, a duct sealing solution provided by Aeroseal LLC. By sealing the leaks, Aeroseal helped reduce by more than 217,000 kWh the amount of energy required by the building’s two exhaust fans. This results in an annual cost savings of about $34,000. An additional energy savings of an estimated $3,000 a year was accomplished through increased heating efficiencies resulting from the duct sealing process.

The Northgate II high-rise apartment building began undergoing energy efficiency upgrades with funding from New Jersey State’s Multifamily Weatherization Assistance Program (WAP). To qualify for this funding, an energy audit of the entire 308-unit apartment building was performed and a course of action was determined. Among the various requirements outlined in the final project plan, the independent auditors specifically specified the use of the Aeroseal technology to effectively seal the duct leaks that existed throughout the building’s exhaust duct system.

“Our multi-family building specialists have a keen interest in ventilation systems and the wasted energy that often results from leaky ductwork,” said Don Casper, auditor for Steven Winter Associates. “Through our ongoing experience with Aeroseal technology, we’ve come to including the Aeroseal process as a standard recommendation when leaky duct systems are a concern.”

Aeroseal seals leaks from the inside of the duct system. Applied as a non-toxic aerosol mist, it is pumped throughout the interior of the ductwork where it accumulates and bonds around the various gaps and leaks throughout the system until they are permanently sealed.

“Preliminary testing revealed fairly large gaps throughout the building’s vertical exhaust ducts,” said John Ambrose, McDonald Building Company. “The Aeroseal process fixed that problem and in doing so, helped to significantly improve the efficiency of the building’s two exhaust fans. Aeroseal technology played a significant role in helping reduce energy consumption and ultimately meeting the requirements of the state’s Weatherization Assistance Program.”

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Publication date: 01/16/2012