ClearSign Technologies designs and develops combustion technologies, principally its patented ClearSign Core™ system, that reduce emissions and improve fuel efficiency in industrial and commercial heating applications including process heaters, boilers, and flares used in oil refining, petrochemical processing, and power generation. The company operates through an asset-light partnership model, licensing its technology to original equipment manufacturers and service providers rather than manufacturing directly, generating revenue through licensing agreements and product sales. ClearSign's core value proposition centers on achieving low nitrogen oxide emissions (5 ppm or below) without external pollution control systems while delivering fuel savings of 3–7% and operational benefits such as reduced maintenance and extended equipment life, positioning the company to benefit from increasingly stringent environmental regulations in key markets like California and Texas.