ClearSign Receives Order for Next Phase of 32-Burner Project for California Refinery

Project encompasses Two Heaters and Consists of New Flat Flame Application TULSA, OK / ACCESS Newswire / May 14, 2026 / ClearSign Technologies Corporation (Nasdaq:CLIR) ("ClearSign" or the "Company"), a leader in advanced combustion and sensing technologies that help industrial operators dramatically reduce emissions, increase efficiency and support the use of cleaner fuels including hydrogen, announces that it has received a purchase order for the physical testing and demonstration of burners as the second phase of a process heater retrofit project comprising of a total of 32 ClearSign Core™ burners to be installed in the customers California refinery. "We are pleased to have completed the initial engineering and computational simulation for this large project for a major refinery in the California market, and to now move into testing and demonstrating the physical burners at Zeeco's full-scale test facility," said Jim Deller, Ph.D.