Mr. William Crossland reports

THERMAL ENERGY INTERNATIONAL TO ANNOUNCE FISCAL 2024 THIRD QUARTER FINANCIAL RESULTS ON APRIL 25, 2024

Thermal Energy International Inc. will release its fiscal 2024 third quarter financial results prior to market open on Thursday, April 25, 2024. Management will host an earnings conference call and webcast to review the financial results at 8:30 a.m. ET the same morning. A question-and-answer session will follow management's prepared remarks, at which time qualified equity analysts will be able to submit questions via the webcast.

Joining the Webcast via Microsoft Teams

A live webcast of the earnings call with a slide presentation will be available at https://bit.ly/MSTeamsLauncher. You may join the webcast via MS Teams on your computer, mobile app or room device.

Meeting ID: 336 346 945 221Passcode: bwTidd

For more information on joining an MS Teams meeting, visit: https://bit.ly/TMGMSTeams

Dial-in Instructions

For anyone unable to join via MS Teams, there will also be a dial-in option to join the conference call by phone. Please note that this option will be audio only. To access the conference call via dial-in, please use the information below.

Calling from Canada: +1 437-703-4481Find a local numberPhone Conference ID: 951 767 501#

Thermal Energy's financial statements and management's discussion and analysis for the three-month period ended February 29, 2024 will be filed on SEDAR+ at www.sedarplus.ca following the release, and will be available on the same day on Thermal Energy's website at https://investors-thermalenergy.com/en/financial-overview.

Readers are encouraged to subscribe to TEI News to receive strategic news and updates directly to their inbox.ENDS

For media enquiries contact:Thermal Energy International Inc.Canada: 613-723-6776UK: +44 (0)117 917 2179Marketing@thermalenergy.com

For investor enquiries:William Crossland

President and CEOThermal Energy International Inc.613-723-6776Investors@thermalenergy.com Notes to editors

About Thermal Energy International Inc.

Thermal Energy International Inc. provides energy efficiency and emissions reduction solutions to Fortune 500 and other large multinational companies. We save our customers money by reducing their fuel use and cutting their carbon emissions. Thermal Energy's proprietary and proven solutions can recover up to 80% of energy lost in typical boiler plant and steam system operations while delivering a high return on investment with a short, compelling payback.

Thermal Energy is a fully accredited professional engineering firm with engineering offices in Ottawa, Canada, Pittsburgh, USA, as well as Bristol, UK, with sales offices in Canada, UK, USA, Germany, Poland, and Italy. By providing a unique mix of proprietary products together with process, energy, and environmental engineering expertise, Thermal Energy can deliver unique, site-specific turnkey and custom engineered solutions with significant financial and environmental benefits for our customers.