The Monroeville Mall was heating and cooling 1.2 million sq. ft. of retail space with aging equipment that operated at less than optimal efficiency. What’s more, the chillers used ozone- depleting R-11 refrigerant, which is scheduled for phase-out. Mall management wanted to upgrade the building’s infrastructure to improve energy efficiency, but the project had to be cost-effective, with significant operating cost savings and a quick payback. I

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