10-Building Corporate Office Complex
Collaborating on a highly successful pilot project
- A 10-building complex in Michigan with gross floor area of 882,000 square feet is principally occupied by a global automotive supply corporation. The combined office, research, and testing lab facility includes a central cooling and heating plant, document center, fitness center, and 2,000-square-foot data center.
- A building automation system (BAS) in the central plant controls the HVAC systems in all ten buildings.
- After learning about the local utility’s pilot retro-commissioning (RCx) incentive program, the corporation’s building engineers estimated that they could reduce electricity use by 800,000 kilowatt-hours (kWh) and natural gas use by 15,000 hundred cubic feet (ccf) through RCx.
- They required an experienced RCx service provider to lead them through a successful RCx program to achieve these energy savings.
- We guided the corporation to apply for participation in the utility’s RCx program and helped them thoroughly understand the RCx process to address any questions and concerns.
- During the investigation phase, we conducted a site visit and collected and analyzed data. The 13 energy-saving opportunities we identified have the potential to significantly reduce electricity and natural gas use.
- During the implementation phase, 11 of the 13 measures were implemented by the corporation’s building engineering and preferred contractors.
- Most measures impacted the HVAC system but one impacted lighting. Changes were made to temperature and pressure setpoints, fan speeds, and equipment schedules.
- Verified electricity savings totaled nearly 2 million kWh—more than double the original target. In addition, verified natural gas savings totaled 24,300 ccf.
- The strong collaboration and frequent communication between site staff and our energy engineers was critical to maximizing energy savings from this project.