The ASHRAE Winter Conference features eight conference tracks, tours, social events and a keynote speech from retired NFL referee Ed Hochuli.

The event is scheduled for Jan. 12-16 in Atlanta at the Omni Hotel Atlanta CNN Center.

The event is scheduled for Jan 12-16 in Atlanta at the Omni Hotel Atlanta CNN Center.

Returning to Las Vegas was a good play for ASHRAE, with the society’s winter meeting attracting its largest crowd since 2011 — the last time the meeting was held there, officials said.