TULSA, Okla., October 23, 2025 -- 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 safety, and support the use of cleaner fuels including hydrogen, today announces it received an engineering order for a fourth low-emission retrofit flare

Planned Retrofit of Two Process Heaters at a California refinery Underscores Growing Adoption of ClearSign's Higher Efficiency, Low-Emission Combustion Solutions TULSA, OK / ACCESS Newswire / October 7, 2025 / 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 safety, and