CMS Viron installed energy efficient water chillers and boilers at the insurance company's offices that will provide energy savings to Physicians Mutual of almost $335,000 annually. The equipment includes three 300-ton chillers, six gas-fueled low-pressure steam boilers and a direct digital control system with 800 points of control in Physician Mutual's building. As part of the project, CMS Viron also has installed a backup power supply system.