American air conditioning, heating and refrigeration exhibition International Air -Conditioning, Heating, Refrigeration Exposition abbreviation: AHR, is by the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) and the American Refrigeration and Air Conditioning Association (ARI) organized by the United States International Exhibitions Co. International Exposition Co.) to undertake. The first exhibition was held in 1930, is a long history in North America,