Fourth Burner Sold to THM for West Texas Customer

TULSA, OK / ACCESS Newswire / October 1, 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, today announces that it has received another purchase order for a ClearSign Core^™ M1 burner. The order was received from heater manufacturer Tulsa Heaters Midstream ("THM") and is the fourth order from this customer destined for the Permian Basin in West Texas.

"THM has been an outstanding customer and sales channel for us, and the continued momentum of our M-Series midstream burners is extremely encouraging," said Jim Deller, Ph.D., Chief Executive Officer of ClearSign. "With this order, THM has secured four M1-Series orders for this customer in the Permian Basin, and the seventh order overall into this region since May of this year. The Permian Basin in West Texas is one of the industry's most important operating markets, and we believe it represents a significant and growing opportunity for ClearSign. With increasing market traction and continued customer adoption, we are confident in the growth potential of our M-Series product line and look forward to continuing to build on this momentum."

The ClearSign Core^™ M1 burner sold through THM will be installed in a new heater at a gas processing facility of an energy company in West Texas. The Company expects to deliver the burner in the fourth quarter of 2026.

Tulsa Heaters Midstream specializes in the midstream gas processing industry and is based in Tulsa, Oklahoma.

About ClearSign Technologies Corporation

ClearSign Technologies Corporation designs and develops products and technologies for the purpose of decarbonization and improving key performance characteristics of industrial and commercial systems, including operational performance, energy efficiency, emission reduction, safety, the use of hydrogen as a fuel and overall cost-effectiveness. Our patented technologies, embedded in established OEM products as ClearSign Core^™ and ClearSign Eye^™ and other sensing configurations, enhance the performance of combustion systems and fuel safety systems in a broad range of markets, including the energy (upstream oil production and down-stream refining), commercial/industrial boiler, chemical, petrochemical, transport and power industries. For more information, please visit www.clearsign.com.

For further information:

Investor Relations:
Matthew Selinger
Firm IR Group for ClearSign
+1 415-572-8152
mselinger@firmirgroup.com

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SOURCE: ClearSign Technologies

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