$34,000 Annual Energy Savings from Sealing Jersey Apartment High-Rise

Forester Daily News (FDN) recently published a story about an Aeroseal project that yielded $34,000 annual energy savings. Wow!

Owners of Northgate II, a Section 8 community in Camden, New Jersey, were looking to reduce energy costs associated with its 308-unit apartment high-rise. To receive upgrade funding through the State’s Multifamily Weatherization Assistance Program, they had to prove that upgrades would result in substantial energy savings and a payback period of ten years or less. Energy auditors brought in to evaluate and recommend an effective course of action specified changes be made to the building’s electrical and mechanical systems. They also insisted that Aeroseal be used to seal leaks throughout the high-rise’s entire duct system.

FDN Contributor Carol Brzozowski writes, “In an example of HVAC innovations, a 23-story high rise apartment building in New Jersey derived $34,000 in annual energy savings after property managers utilized the Aeroseal duct sealing technology in exhaust shafts and replaced dampers.” This example is one of many instances of the money-saving benefits of Aeroseal. Read the full FDN article here.

In Brief

  • Property Managers: Fair Share Development
  • Project Contractors: McDonald Building Co.
  • Property Name: Northgate II
  • Type: Section 8, 23-story high-rise, 308 units
  • Goal: Reduce energy usage by 15% or more
  • Before Aeroseal: Average energy leakage: 971 CFM*
  • After Aeroseal: Average 83% reduction in CFM loss
  • Cost savings: $34,000/year from reduced exhaust fan usage. An additional $3,000/year from increased heating efficiency
  • Payback: 3-4 years
23-story high-rise in New Jersey, USA

Northgate II, 23-story high-rise apartment building, in Camden, New Jersey gets ductwork sealed with Aeroseal.

An initial audit of the 23-story high rise’s ductwork showed that there were thousands of leaks throughout the building’s exhaust system. As a result, the two large fans used to draw stale air out of each of the individual apartments consumed a lot of energy to do its job. By effectively sealing the leaks with aeroseal and updating the system’s dampers, the fans’ energy use was reduced by more than 217,000 kw/hours – a savings of more than $34,000 a year in electricity. Building owners also achieved an additional $3,000 a year in savings through more effective heating.


Preliminary testing revealed fairly large gaps throughout the building’s vertical exhaust ducts. The Aeroseal process fixed that problem and in doing so, significantly improved 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.

John Ambrose
McDonald Building Company

Our multi-family building specialists have a keen interest in ventilation systems and the wasted energy that often results from leaky ductwork. 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.

Don Casper
Energy Auditor
Steven Winter Associates

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.

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