HVAC market equipment maker Testo Inc. hosted a North American Technician Excellence seminar May 28 at Johnstone Supply’s Sun Valley, Calif., location.

The seminar was designed to help Southern California contractors learn how HVACR products work pertaining to superheat, subcooling and saturation. Testo’s regional manager Bob Allomong and Johnstone Supply Group’s manufacturer representative Debbi Vanderwalker taught the class.

Josh Bramhall, an employee of Johnstone Supply Sun Valley said he learned a lot at the class.

“I really appreciate the follow-through and effort that was put out,” he said. “We love the products, but to really show the support and what they do and how they work is awesome.”

 Testo does NATE training sessions regularly throughout the country.