Centervill, OH (PRWEB) December 07, 2011 -- A 23-story high rise apartment building in Camden, New Jersey 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 new duct sealing solution developed at Lawrence Berkeley National Laboratory. By sealing the leaks, Aeroseal helped reduce by more than 217,000 kw/hours 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 aeroseal duct sealing process.