ASHRAE 2026 Winter Conference & AHR Expo Review The ASHRAE 2026 Winter Conference and AHR Expo concluded on February 4, 2026, in Las Vegas. The combined events drew a record-breaking crowd, welcoming an estimated 50,000 attendees over three days. Key Statistics and Participation Winter Conference Registrants: The conference specifically drew 3,825 registrants. Exhibitor Presence: The AHR Expo hosted 1,945 exhibitors, including 601 international companies and 186 first-time