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2500 Windy Ridge Parkway
A Showcase in Energy Efficiency
  Project Highlights – Windy Ridge Case Study
With more than $11 billion invested in real estate, Wells Real Estate
Funds is committed to sustainable practices that promote growth.



                                        The McKenney’s in-house
                                        design engineering team
                                        developed a comprehensive
                                        energy model of the building to
                                        analyze and compare multiple
                                        upgrade options, including
                                        alternative plant configurations
                                        and chiller efficiencies.
As a result, the firm has implemented major green initiatives for many
of its properties, including the 15-story office building at 2500 Windy
Ridge Parkway in Atlanta.
That property is now recognized as one of the area’s flagship models
for sustainability and energy efficiency.

                         The building-which serves as corporate
                         headquarters for Coca-Cola Enterprises-was built
                         in 1985.
                         Wells wanted to enhance the original mechanical
                         systems to improve efficiency and McKenney’s
                         was chosen to manage the upgrade with a focus
                         on energy and environmental stewardship.

  The central energy plant (CEP) provides heating and air-conditioning
  services for the entire building.
Significant operational improvements had been made previously by
Wells to increase Energy Star® performance from 75 to 92 but much of
the original equipment was at the end of its useful life and needed to
be replaced.

                           The McKenney’s in-house design engineering
                           team developed a comprehensive energy model
                           of the building to analyze and compare multiple
                           upgrade options, including alternative plant
                           configurations and chiller efficiencies.

   The team installed a variable primary flow, all
   VFD CEP featuring two 425-ton water-cooled
   chillers piped in a series counterflow
   arrangement for more operational control and
   greater energy efficiency.
Even though the variable flow configuration required an additional
$100,000 investment, energy savings were immediate.
As a result, Wells expects a payback of 16 months for the additional
investment and is projecting to recoup its investment for the
complete CEP transition within five years.

                       The CEP upgrade was only the beginning.
                         McKenney’s upgraded the building automation
                         system (BAS) to maximize operational savings.

                         The control system for the pneumatic terminal
                         units, fan coil units and air handling units was
                         replaced with a Web-based, electronic direct
                         digital control (DDC) system.
The new controls incorporate McKenney’s innovative bdoc® technology
for customized operation of the central plant.
Maximizing Natural Resources

 Wells Real Estate Funds understood that
 conserving natural resources would be critical
 for improving sustainability.
 Georgia has experienced a precipitous drop in
 rainfall in recent years, which has
 compromised natural water resources.
 As a result, McKenney’s installed a condensate
 recovery system to capture discharge from
 each of the main air-handling units (AHUs)
 into a 250-gallon capacity drum.
 The condensate from these units is typically
 directed to the sewer for processing at the city
 water treatment plant.
 With the new McKenney’s system, the water is
 used for cooling tower operations.
Maximizing Natural Resources
 In less than two years, the new system has saved more than 262,000
 gallons of water, which has reduced the amount of water used for
 cooling tower operations by about 46 percent.
 In addition, less energy is exerted to collect, treat and transport the
 water.
 McKenney’s also designed and installed a 15,000-gallon rainwater
 harvesting system that was integrated into the existing roof drainage
 system.
 The water retained from the system is used to irrigate land around
 the property.
 In less than six months, Wells has saved more than 80,000 gallons of
 water.
Recognition of Natural Resources of Wells Real Estate Funds Innovation
 With 19 LEED®- certified and 48 Energy Star®- rated properties in its
 portfolio, Wells Real Estate Funds has earned its distinction as an
 environmental champion.
 The 2500 Windy Ridge Parkway property is one of its most prized buildings.

                          This is due in part to the CEP and BAS upgrades as
                          well as AHU condensate and rainwater harvesting
                          systems that McKenney’s implemented to help
                          improve the building’s Energy Star rating from
                          75 to 98.
                          As a result, Wells received LEED Gold Certification
                          and won an Innovation in Business award at the
                          2011 LEED-Showcase Awards for the greater
                          Atlanta area.
Project Team
 Owner: Wells Real Estate Funds
 Contractor/Engineer: McKenney’s, Inc.

The Challenge
 Contractor/Engineer: McKenney’s, Inc.
 Implement strategies and install equipment to conserve natural resources


The Solution
 Analyze and compare systems for most cost- and energy-efficient solution
 Install new series variable flow CEP
 Implement new web-based digital control systems
 Repurpose condensate for cooling tower makeup water
 Harvest water for irrigation
The Results
 Supported LEED® Gold Certification award
 Improved Energy Star® rating from 75 to 98
 Reduced water use for cooling tower operations by 46 percent
 Saved more than 80,000 gallons of irrigation water in 6 month
 Projected 16 month payback for variable flow configuration investment
 Five year projection to recoup entire CEP investment
Atlanta Office: 1056 Moreland Industrial Boulevard
                 Atlanta, GA 30316
                 P: 404-622-5000
Charlotte Office: 3601 Performance Road
                  Charlotte, North Carolina 28214
                  P: 704-357-1200

            sales@mckenneys.com
         www.mckenneys.com

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Energy Services Contractors - A Case Study in Energy Efficiency

  • 1. 2500 Windy Ridge Parkway A Showcase in Energy Efficiency Project Highlights – Windy Ridge Case Study
  • 2. With more than $11 billion invested in real estate, Wells Real Estate Funds is committed to sustainable practices that promote growth. The McKenney’s in-house design engineering team developed a comprehensive energy model of the building to analyze and compare multiple upgrade options, including alternative plant configurations and chiller efficiencies.
  • 3. As a result, the firm has implemented major green initiatives for many of its properties, including the 15-story office building at 2500 Windy Ridge Parkway in Atlanta. That property is now recognized as one of the area’s flagship models for sustainability and energy efficiency. The building-which serves as corporate headquarters for Coca-Cola Enterprises-was built in 1985. Wells wanted to enhance the original mechanical systems to improve efficiency and McKenney’s was chosen to manage the upgrade with a focus on energy and environmental stewardship. The central energy plant (CEP) provides heating and air-conditioning services for the entire building.
  • 4. Significant operational improvements had been made previously by Wells to increase Energy Star® performance from 75 to 92 but much of the original equipment was at the end of its useful life and needed to be replaced. The McKenney’s in-house design engineering team developed a comprehensive energy model of the building to analyze and compare multiple upgrade options, including alternative plant configurations and chiller efficiencies. The team installed a variable primary flow, all VFD CEP featuring two 425-ton water-cooled chillers piped in a series counterflow arrangement for more operational control and greater energy efficiency.
  • 5. Even though the variable flow configuration required an additional $100,000 investment, energy savings were immediate. As a result, Wells expects a payback of 16 months for the additional investment and is projecting to recoup its investment for the complete CEP transition within five years. The CEP upgrade was only the beginning. McKenney’s upgraded the building automation system (BAS) to maximize operational savings. The control system for the pneumatic terminal units, fan coil units and air handling units was replaced with a Web-based, electronic direct digital control (DDC) system.
  • 6. The new controls incorporate McKenney’s innovative bdoc® technology for customized operation of the central plant.
  • 7. Maximizing Natural Resources Wells Real Estate Funds understood that conserving natural resources would be critical for improving sustainability. Georgia has experienced a precipitous drop in rainfall in recent years, which has compromised natural water resources. As a result, McKenney’s installed a condensate recovery system to capture discharge from each of the main air-handling units (AHUs) into a 250-gallon capacity drum. The condensate from these units is typically directed to the sewer for processing at the city water treatment plant. With the new McKenney’s system, the water is used for cooling tower operations.
  • 8. Maximizing Natural Resources In less than two years, the new system has saved more than 262,000 gallons of water, which has reduced the amount of water used for cooling tower operations by about 46 percent. In addition, less energy is exerted to collect, treat and transport the water. McKenney’s also designed and installed a 15,000-gallon rainwater harvesting system that was integrated into the existing roof drainage system. The water retained from the system is used to irrigate land around the property. In less than six months, Wells has saved more than 80,000 gallons of water.
  • 9. Recognition of Natural Resources of Wells Real Estate Funds Innovation With 19 LEED®- certified and 48 Energy Star®- rated properties in its portfolio, Wells Real Estate Funds has earned its distinction as an environmental champion. The 2500 Windy Ridge Parkway property is one of its most prized buildings. This is due in part to the CEP and BAS upgrades as well as AHU condensate and rainwater harvesting systems that McKenney’s implemented to help improve the building’s Energy Star rating from 75 to 98. As a result, Wells received LEED Gold Certification and won an Innovation in Business award at the 2011 LEED-Showcase Awards for the greater Atlanta area.
  • 10. Project Team Owner: Wells Real Estate Funds Contractor/Engineer: McKenney’s, Inc. The Challenge Contractor/Engineer: McKenney’s, Inc. Implement strategies and install equipment to conserve natural resources The Solution Analyze and compare systems for most cost- and energy-efficient solution Install new series variable flow CEP Implement new web-based digital control systems Repurpose condensate for cooling tower makeup water Harvest water for irrigation
  • 11. The Results Supported LEED® Gold Certification award Improved Energy Star® rating from 75 to 98 Reduced water use for cooling tower operations by 46 percent Saved more than 80,000 gallons of irrigation water in 6 month Projected 16 month payback for variable flow configuration investment Five year projection to recoup entire CEP investment
  • 12. Atlanta Office: 1056 Moreland Industrial Boulevard Atlanta, GA 30316 P: 404-622-5000 Charlotte Office: 3601 Performance Road Charlotte, North Carolina 28214 P: 704-357-1200 sales@mckenneys.com www.mckenneys.com