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ENERGY STAR Labeled Building Profile

526 South Church
526 South Church Street
Charlotte, NC 28202
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526 South Church Street is a 13-story high rise located in downtown Charlotte, NC. The building currently houses the operational functions for Duke Energy. The facility is owned and occupied by Duke Energy and managed by Jones Lang LaSalle. The first phase of the building was originally constructed in 1971, and the second phase was completed in 1985. The building was built with a focus on energy efficiency and is equipped with the following:

-- Inset window design to reduce solar load on the building by providing partial shading.


-- Thermal heat storage, three 30,000-gallon hot water storage tanks: in the winter hot water is heated during off-peak demand times and utilized to heat the office space during the winter on-peak period.


-- Thermal ice storage, 40 ice storage tanks: in the spring, summer, and fall, these tanks are used to produce and store ice, which is then used to supplement the cooling load for the building during the summer on-peak period.


-- Air handling units on each floor utilize an air side economizer to handle the cooling load in the winter when the outside temperature is below 50 degrees.


-- Outside air, return air, and mixed air dampers have been replaced with low leakage energy-efficient dampers.


-- Variable speed drives have been installed on one of the chillers; this drive enables the plant to operate more efficiently under low-load conditions.


-- Dedicated chillers have been added to the building to handle after-hour cooling load for 24/7 areas in the buildings.


-- Building automation systems (BAS) controls the majority of the HVAC and lighting systems in the building, allowing systems to be de-energized after normal operating hours and during holidays. Another feature is the ability to control systems via the Web to meet changing occupancy load in specific building areas or to view the system to respond to alarms or failures.


-- Through an ongoing project to decrease lighting load, approximately 98 percent of the T-12 fluorescent fixtures in the building have been converted to accommodate T-8, 28-watt lamps. This conversion results in approximately a 43 percent power reduction consumption per each four-lamp fixture.


-- The exterior metal halide lights were recently replaced with LED light fixtures.


-- All 14 of the elevators have LED lamps installed, and the controls on all elevators were upgraded with smart controls for passenger and equipment efficiencies.


-- The escalators are equipped with soft starts and load minimizing power commanders.


-- Variable speed drives and direct digital control have been added to the facility to further reduce energy cost. The drives and direct digital controllers replaced the pneumatic controls that were originally installed.


-- Installed occupancy sensors in conference rooms, offices, and the main cafeteria seating area.


-- Installed vending machine occupancy sensors. These sensors turn off the machines in time of low occupancy while continuing to keep the product conditioned.


While applying for the ENERGY STAR, it was confirmed that the building did not meet all of the ventilation requirements as outlined in ASHRAE 62.1-2007. We installed additional controls on all air handling systems in the building to meet criteria for obtaining the ENERGY STAR for the building. The project was recently completed and is operating as designed.

Internal Awareness & Occupant Communications

In 2010, the facility management team participated in Earth Day activities. The focus was on sustainability and energy awareness. We shared the various facility projects that were completed and how our recycling process works to support sustainability efforts.


-- To help control consumption and waste of the restroom soap, touch-free soap dispensers have been placed in almost all restroom locations.


-- Touch-free water flush devices have been installed on bathroom fixtures to reduce water consumption.


-- Construction recycling bins are used to recycle construction debris and all metal during construction projects.


-- A green and environmentally friendly product is utilized for carpet maintenance.


-- All possible material is recycled from project activities; this includes more than 92 percent of a sky bridge that connected 526 South Church to an adjacent building under demolition.




"We have made great strides in making the facility a more energy-efficient building. The ENERGY STAR is a great achievement for the facility; our goal is to keep qualifying and re-apply every year."

-- John Osborne, Senior Chief Engineer, Jones Lang LaSalle

Please note: Narrative information in this profile has been provided by Duke Energy or a representative of this facility. Other building information was verified and submitted to EPA at the time of application. Building energy performance, operating characteristics, and ownership/management may be subject to change over time.

Service Provider:
Jones Lang LaSalle

Building Owner:*
Duke Energy

Property Manager:*
Jones Lang LaSalle

Year(s) Labeled (Rating):
2010 (81)
2012 (78)

Facility Type: Office

Total Floorspace: 904738 sf

Year Constructed: 1972

Contract Type: Single Turn-Key Contract
Financing Type: Internal Capital

Technologies Used:
   Stage 1-Recommissioning
   Stage 2-Lighting
   Stage 3-Load Reductions
   Stage 4-Fan Systems
   Stage 5-Heating and Cooling Plant
   Other Technologies/Strategies