Editor’s Note: This story originally appeared in slightly different form in Contracting Business.com, a sister publication to SN within Penton Media. Alternative refrigeration systems were among the topics discussed at the Contracting
Business.com and Supermarket News 
Refrigeration Roundtable, which was held during HVAC Comfortech/HVACR Week in September 2010. These include secondary loop systems, distributed systems, cascade systems that use carbon dioxide (CO2) and compact chiller ...

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