Refrigeration equipment in a grocery store is designed to keep perishable food cold through rain or shine, every hour of every day. In the past, designers focused their efforts mostly on reliability, ensuring that compressors and condensers could keep up on the hottest day of the year. This has worked fine... until recently. Energy prices have escalated to a point where they are eating into profits. Operating costs have become a real concern. At the same time, customers are more interested in sustainability and the carbon footprint of their favorite store. A big part of the answer is energy efficiency.