TULSA, Okla., August 31, 2023 — ClearSign Technologies Corporation (Nasdaq: CLIR) (“ClearSign” or the “Company”), an emerging leader in industrial combustion and sensing technologies that improve energy, operational efficiency and safety while dramatically reducing emissions, today provides an update on operations for the second quarter ended June 30, 2023.


“Our order flow increased in the second quarter, both in process burners and our boiler burner line,” said Jim Deller, Ph.D., Chief Executive Officer of ClearSign. “The execution of these initial sales, for both boiler burners and process burners, will set the stage for our future growth.  Getting these installations in the field will give us a larger installed base and reference list going forward.  Additionally, the processing and execution of these commercial orders allows us to fine tune our processes with suppliers and collaborative partners in order to be prepared for future larger scale product deployments. We are very encouraged by the engagement we are receiving in the industry regarding our technologies and we believe that our recently announced Phase 2 government grant award through the Small Business Innovative Research (SBIR) program with the Department of Energy (DOE), which provides direct support for the engineering and commercialization of our 100% hydrogen burner products, will further enhance our visibility in the industry” concluded Dr. Deller.


Recent strategic and operational highlights during and subsequent to the end of the second quarter 2023 include:


Completed Successful Phase 1 Testing of Ultra-Low NOx 100% Hydrogen Burner and Awarded Phase 2 SBIR Grant for $1.65M: With this completion of the Phase 1 work, the Company submitted a follow-up proposal with testing data and documented industry support to continue the development work with a Phase 2 grant. Subsequently, the Company was awarded a Phase 2 government grant through the SBIR program with the DOE to further the development and commercialization of a ClearSign Core™ Ultra Low NOx burner fueled with 100% hydrogen.


Received Engineering Order and Follow on order for Two Multi Burner Heaters from a California Refinery: The order is for two separate heaters and for a total of 13 burners.  This is from an early customer who has ongoing experience with the operation and performance of ClearSign burner technology.  The supply of ClearSign’s technology is to help the refinery adhere to the strict emissions limits implemented to support California’s clean air goals.


Entered the Texas Gulf Coast Market with Burner Sale to Global Chemical Company: The Company announced the first sale of its fire tube boiler burner technology into a non-boiler heater of a global chemicals company in the Texas market. The boiler burner will be installed into a process heater, which is replacing an existing heater and SCR (Selective Catalytic Reduction) system. Both heater and burner were sold by Tulsa Heaters Midstream, a fast growing and innovative heater provider based in Tulsa, Oklahoma. The burner is scheduled to be installed in the third quarter of 2023.


The Company recognized approximately $150 thousand in revenue during the three months ended June 30, 2023, as compared to zero revenue for the same period of 2022.


Cash, cash equivalents and short-term investments were approximately $8.5 million as of June 30, 2023.


There were 38,562,086 shares of the Company’s common stock issued and outstanding as of June 30, 2023.


The Company will be hosting a call at 5:00 PM ET today. Investors interested in participating on the live call can dial 1-866-372-4653 within the U.S. or 1-412-902-4217 from abroad. Investors can also access the call online through a listen-only webcast at  https://app.webinar.net/dWz7ApJRlBv or on the investor relations section of the Company’s website at



The webcast will be archived on the Company’s investor relations website for at least 90 days and a telephonic playback of the conference call will be available by calling 1-877-344-7529 within the U.S. or 1-412-317-0088 from abroad. Conference ID #4731576. The telephonic playback will be available for 7 days after the conference call.



About ClearSign Technologies Corporation


ClearSign Technologies Corporation designs and develops products and technologies for the purpose of improving key performance characteristics of industrial and commercial systems, including operational performance, energy efficiency, emission reduction, safety 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.



Cautionary note on forward-looking statements


All statements in this press release that are not based on historical fact are “forward-looking statements.” You can find many (but not all) of these statements by looking for words such as “approximates,” “believes,” “hopes,” “expects,” “anticipates,” “estimates,” “projects,” “intends,” “plans,” “would,” “should,” “could,” “may,” “will” or other similar expressions. While management has based any forward-looking statements included in this press release on its current expectations on the Company’s strategy, plans, intentions, performance, or future occurrences or results, the information on which such expectations were based may change. These forward-looking statements rely on a number of assumptions concerning future events and are subject to a number of risks, uncertainties and other factors, many of which are outside of our control, that could cause actual results to materially differ from such statements. Such risks, uncertainties and other factors include, but are not limited to our ability to successfully deliver, install, and meet the performance obligations of our burners in the California and Texas market, our ability to further expand the sale of ultra-low NOx process and boiler burners, our ability to successfully perform engineering orders, our ability to successfully develop our 100% hydrogen burner with the Phase 2 grant funding, general business and economic conditions, the performance of management and our employees, our ability to obtain financing, competition, whether our technology will be accepted and adopted and other factors identified in our Annual Report on Form 10-K filed with the Securities and Exchange Commission and available at www.sec.gov and other factors that are detailed in our periodic and current reports available for review at www.sec.gov. Furthermore, we operate in a competitive environment where new and unanticipated risks may arise. Accordingly, investors should not place any reliance on forward-looking statements as a prediction of actual results. We disclaim any intention to, and, except as may be required by law, undertake no obligation to, update or revise forward-looking statements to reflect events or circumstances that subsequently occur or of which we hereafter become aware.



For further information:


Investor Relations:

Matthew Selinger

Firm IR Group for ClearSign

+1 415-572-8152