Copeland Discus semi-hermetic compressors have, for years, been the choice and the standard in the refrigeration industry. Copeland Discus? compressors are the most energy-efficient products available for multiple refrigeration needs. In fact, Discus? compressors have led the industry in energy efficiency for decades, delivering up to 12.2% more energy efficiency than any reed compressor technology. Equipped with CoreSense? Protection, Copeland Discus compressors are also built to last, saving even more money in maintenance and service calls.