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ESI Flips Switch on New Roof-Top Photovoltaic Array; Overall Building Energy Efficiency Reaches 41 Percent Better Than Code

Milwaukee, WI, July 12, 2010 --( Environmental Systems, Inc. (ESI) announced today it completed installation of a new photovoltaic (PV) array atop its corporate headquarters. Located in Brookfield’s Gateway West Commerce Center, the building is known as Gateway West Sustainable 1.

“As a viable alternative energy source, the PV system will reduce the cost of operating the building,” ESI President Paul Oswald says, “and contribute to overall sustainability by generating about 8 percent of the building’s electrical load.”

The PV array on the south side of the building produces 8 percent of the overall energy supply. Overall building energy efficiency now runs 41 percent better than baseline standards. ESI worked with Stephen Perry Smith Architects and Hunzinger Construction to design the building to evolve with advances in technology and efficiency, which is demonstrated with the recent PV array installation.

“While the payback on PV systems remains lengthy, the combination of actual electrical cost reduction and the educational opportunity this presents to our employees, customers and the community, enhances the ROI for our business,” Oswald says.

Fast Facts: ESI Photovoltaic Array

Number of panels: 78
Rated output: 18 kW
Annual output: 22,000 kWh
Projected life cycle savings: $65,603
CO2 emission reduction: 24 tons per year
Roof area used: 5,300 square feet
Solar panel manufacturer: SolarWorld
PV system design and installation: Lemberg Electric

Environmental Systems, Inc. provides performance-building solutions for control and automation, systems integration, security, life safety, advanced software applications, energy services and building operations. ESI’s solutions reduce operating costs, improve sustainability and provide a positive return on investment. Visit for more information.

[Note: A digital photo of the solar array can be requested by contacting Karl Robe at]

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