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Duke Realty

Even though The Towers of Kenwood had recently retrofitted their lighting systems, they found that there was an opportunity to get even more bang for their buck. They turned to LED fixtures to significantly reduce the cost of their lighting system.

2156

Reduced annual kW demand

1108760

kWh reduced annual energy consumption

$ 127848

Total savings within the first year

Background

Duke Realty Corporation (NYSE:DRE) owns and operates approximately 139 million rentable square feet of industrial and office assets, including medical space, in 18 major U.S. cities. As a leader in energy management strategies for the facilities industry, Duke has implemented energy efficiency programs across more than one-third of the firm’s 300+ office buildings.

Situation

The Towers of Kenwood, a multi-use office complex located in Cincinnati, had previously undergone basic lighting retrofits involving newer technologies. However, despite the relatively modern lighting system, Duke’s financial analysis showed that there was even more room for improvement. By implementing lighting controls, more efficient LED fixtures, and standardizing lamp types, The Towers of Kenwood would significantly reduce energy consumption and operating costs.

Solution

Eco Engineering put together a plan and financial projections based on a detailed, engineering-grade audit of the office complex. Both the design and the installation of this project faced two major hurdles:

First, the project had to account for highly customized, multiple-tenant needs related to lighting.

Second, within the Towers, there were sensitive areas, like stock trading floors or 24/7 radio stations – these were difficult to access.

We started this project by planning for those logistical challenges in the beginning. Next, we used energy efficient lighting throughout most of the office complex, specifically using ultra-efficient, low-wattage LED lamps and troffers. Then we selected and installed the appropriate LED technologies to replace stairwell fixtures, exit signs, and egress fixtures. Additionally, we incorporated various types of occupancy sensors throughout the entire facility, providing a customized framework for reducing the operating hours of fixtures on a space-by-space basis.

Energy Savings

The project met both lighting quality and financial expectations. Additionally, forecasts estimated they payback period would be 2.2-years, with a 46% ROI aided by a substantial incentive from Duke Energy.

  • Annual Demand Reductions: 2,156 kW
  • Annual Consumption Savings: Over 1,108,760 kWh

Incentives

This lighting project projected substantial energy savings within the first year, resulting in significant energy savings and a rapid ROI.

  • The project is expected to deliver total energy savings of $127,848 for the first year.

We incorporated various types of occupancy sensors throughout the entire facility, providing a customized framework for reducing the operating hours of fixtures on a space-by-space basis.

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