About AHR EXPO The World's Largest HVACR Marketplace. The Show brings together over 2,000 exhibiting companies and 40,000 visitors, representing the entire spectrum of the industry including: HVACR manufacturers, engineers, contractors, OEMs, facility managers, and other professionals. The Show also offers over 100 educational seminars, workshops (presented by ASHRAE and others) and new product presentations. McCORMIC PLACE, 2301 S Lake Shore Dr. Chicago, IL 60616 For scheduling a meeting during the show please contact us in advance.