The International Air-Conditioning, Heating, Refrigerating Exposition (AHR Expo) returned to the Windy City in 2015. More than 2,000 manufacturers and suppliers from around the world exhibited thousands of new products to 40,000 visitors representing the entire spectrum of the HVACR industry. Additionally, more than 120 educational seminars, workshops, and new-product presentations were held. Here is your guide to some of what you may have missed at McCormick Place in Chicago. For more information on the expo, go to www.ahrexpo.com.