The United Association’s Rod Jara will be presenting a seminar on teaching chillers and commercial air conditioners as part of the National HVACR Educators and Trainers Conference in Las Vegas.

The March 17-18 event at the Imperial Palace Hotel and Casino is part of HVAC Excellence’s Train the Trainer series. Chiller types, system operation, water quality, cooling towers and related topics will be discussed.

Jara is director of the United Association’s Great Lakes division.

For details on the conference, visitwww.hvacexcellence.orgor call (800) 394-5268.