McKenney's performed a retrocommissioning of the HVAC system and controls at a corporate campus in Atlanta. The existing systems were not functioning properly and were inefficient. McKenney's repaired leaks in the compressed air system, fixed leaking chilled water valves, and recalibrated pneumatic controls. These improvements resulted in the building consuming 20% less energy and saving $120,000 annually, achieving a two year payback in just one year.

1. M
cKenney’s dramatically improved
energy efficiency at a corporate
campus in Atlanta, following an
HVAC system and controls retrocommissioning.
The Challenge
The system and older pneumatic controls
were not functioning properly, and as a result,
occupants were uncomfortable and they were
consuming too much energy. Air compressors
ran constantly due to leaks, several chilled
water valves were not calibrated correctly
and a variable frequency drive (VFD) on one
air handling unit was running in bypass. In
addition, the building owner did not have a
clear understanding of occupancy schedules.
The Solution
The team repaired and replaced major
leaks throughout the compressed air system,
cutting run time in half and raising the air
pressure to an acceptable level. Leaking
chilled water valves were fixed, faulty VFD
wiring was repaired and pneumatic controls,
stats and sensors were recalibrated. The team
also set controls to shut down areas of the
building that did not need 24/7 conditioning.
The Results
The building is consuming 20 percent less
energy—saving the company $120,000
annually—and attaining a projected two year
payback in just twelve months.
Retrocommissioning Gets Results
Project Name
žž International Communications
Company Corporate
Campus Retrocommissioning
Project Location
žž Atlanta, Georgia
Project Team
žž Owner:
Communications Company
žž Contractor: McKenney’s, Inc.
Specializations
bdoc
Energy Management
Markets
žž Corporate Campuses
The content of this document is not intended as an endorsement.
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