http://www.ice-machine-guide.com/taxonomy/term/19/all This acronym stands for "Air-Conditioning & Refrigeration Institute". "The Air-Conditioning and Refrigeration Institute is the national trade association representing manufacturers of more than 90 percent of North American produced central air-conditioning and commercial refrigeration equipment. ARI's national headquarters is located in Arlington, Virginia." (From the ARI website: www.ari.org) en