• Second heat recovery project with this multinational customer, which has over 40 manufacturing sites around the world

Ottawa, Ontario--(Newsfile Corp. - December 15, 2025) - Thermal Energy International Inc. (TSXV: TMG) (OTCQB: TMGEF) ("Thermal Energy" or the "Company"), a provider of innovative energy efficiency and carbon emission reduction solutions to major corporations around the world, is pleased to announce that it has received a $3.2 million turnkey heat recovery order from a leading multinational frozen food company. All figures are shown in CAD.

"Stemming from our first heat recovery project with this customer at another site in 2024, this latest project is yet another strong endorsement of our proven technology and project expertise," said William Crossland, CEO of Thermal Energy International. "Our first project with this customer, which was valued at approximately $1 million, included project development and design, detailed engineering and supply of a Flu-Ace, a HeatSponge and miscellaneous other equipment, but did not include turnkey installation. This latest order is for a full turnkey project. Importantly, with over 40 manufacturing sites around the world, we see very good potential with this customer, which has aggressive greenhouse gas emission reduction targets. The food and beverage sector continues to be the largest source of business for Thermal Energy, with manufacturers across the industry steadfastly committed to reducing their carbon emissions. Improving thermal energy efficiency provides some of the quickest and most cost-effective CO₂ mitigation options while also lowering energy billsⁱ. We're excited to support this customer, and the broader food and beverage industry, as they invest in our proprietary and proven, high-impact sustainability solutions."

Thermal Energy's proprietary, and proven technologies have wide applications in the food and beverage industry. Visit our website at www.thermalenergy.com/food-and-beverage.html to learn more and read our food and beverage case studies.

The revenue from this order is expected to be earned within twelve months.

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ENDS

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.

Thermal Energy's common shares are traded on the TSX Venture Exchange (TSX-V) under the symbol TMG and on the OTCQB under the symbol TMGEF. For more information, visit our investor website at https://investors-thermalenergy.com or company website at www.thermalenergy.com and follow us on Twitter at https://twitter.com/GoThermalEnergy.

Cautionary Statements

This press release contains forward-looking statements relating to, and amongst other things, based on management's expectations, estimates and projections, the anticipated effectiveness of the Company's products and services, the timing of revenues to be received by the Company, the expectation that orders in backlog will become revenue, the anticipated benefits of the Company's current efforts at training and business improvement efforts, opportunities for growth, the Company's belief that it can capitalize on opportunities, the size of markets and opportunities open to the Company. Information as to the amount of heat recovered, energy savings and payback period associated with Thermal Energy International's products are based on the Company's own testing and average customer results to date. Statements relating to the expected installation and revenue recognition for projects, statements about the anticipated effectiveness and lifespan of the Company's products, statements about the expected environmental effects and cost savings associated with the Company's products and statements about the Company's ability to cross-sell its products and sell to more sites are forward looking statements. These statements are not guarantees of future performance and involve a number of risks, uncertainties and assumptions.

Many factors, some of which are outside of the Company's control, could cause events and results to differ materially from those stated. Fulfilment of orders, installation of product and activation of product could all be delayed for a number of reasons, some of which are outside of the Company's control, which would result in anticipated revenues from such projects being delayed or in the most serious cases eliminated. Actions taken by the Company's customers and factors inherent in the customer's facilities but not anticipated by the Company can have a negative impact on the expected effectiveness and lifespan of the Company's products and on the expected environmental effects and cost savings expected from the Company's products. Any customer's willingness to purchase additional products from the Company and whether orders in the Company's backlog as described above will turn into revenue is dependent on many factors, some of which are outside of the Company's control, including but not limited to the customer's perceived needs and the continuing financial viability of the customer. The Company disclaims any obligation to publicly update or revise any such statements except as required by law. Readers are referred to the risk factors associated with the Company's business as described in the Company's most recent Management's Discussion and Analysis available at www.sedarplus.ca.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

ⁱ According to the International Energy Agency, https://www.iea.org/energy-system/energy-efficiency-and-demand/energy-efficiency.