Between 2011 and 2017, the Mayo Clinic reduced the energy consumption of its Rochester, Minnesota, campus by 20%. The Rochester facilities integrated energy efficiency in new construction design, renovated and retrofitted existing buildings and equipment, and encouraged staff to think green. More than any other measure, reprogramming the building automation system (BAS) had the greatest effect on energy savings. The Mayo Clinic optimized the BAS to heat and cool spaces appropriately based on their use. The system also allows for a wider range of temperatures. Other measures that saved energy and costs included retrofitting LED lighting, upgrading computers and monitors, retrofitting fume hoods, repairing duct leaks, installing insulation blankets in the steam system, operating the central cogeneration plants efficiently, and installing heat-recovery systems. The US Department of Energy Better Buildings case study Mayo Clinic: Rochester, MN Campus includes a description of each of these measures and their energy cost savings. By 2017 the Mayo Clinic had saved $4 million in energy costs.
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