MASTERPLAST Nyilvánosan Működő Részvénytársaság

Environmental & Social Information • Sep 5, 2025

PRESS RELEASE

ALTEO replaces gas engine at Tiszaújváros heating power plant with more modern unit

July 14, 2025 – ALTEO-Therm Kft. has successfully completed a HUF 434 million investment project to replace its former 3.2 MW Wärtsilä 220 SG gas engine at its Tiszaújváros site with a modern, refurbished Jenbacher J620 engine.

The project not only involved the replacement of the gas engine, but also included mechanical, electrical and control updates to auxiliary plant systems. As part of the investment project, a new tray cooling unit was also installed, which ensures that the gas engine is available without output limitation even on extremely hot summer days.

As a result of the investment, the efficiency of the Tiszaújváros heating power plant has been significantly improved, while the compact equipment installed provide easier handling. The modernization is also expected to reduce maintenance costs, as the new Jenbacher gas engine has easier access to and better supply of spare parts.

The new gas engine is not only more reliable, but also has better control characteristics. Due to its better load gradient, the control capabilities of the system have also improved, which is an advantage for ALTEO's Virtual Power Plant (AVPP) in providing system balancing services.

With the development, ALTEO has managed to further strengthen its sustainable and efficient energy portfolio, which contributes to the Company's long-term strategy and environmentally-friendly operation.

***

ALTEO

ALTEO is a Hungarian-owned energy service provider and trading company with a modern mindset. The scope of its business activities include the production and trade of energy from renewable energy carriers and natural gas, as well as energy services and development customized to individual corporate needs. The Company provides a reliable and environmentally responsible energy supply based on the sustainable use of renewable energy to its customers, which include small and mediumsized Hungarian enterprises as well as large corporations. Due to its own, optimally designed assets and virtual power plant, the Company provides the most innovative services of the highest quality to its partners. In recent years, innovative business sectors such as e-mobility, waste management and scheduling have been added to this range, where aspects of the circular economy are even more prevalent.

ALTEO was first listed on the Budapest Stock Exchange in October 2010. In 2016, the Company successfully completed a public offering. The Company is continuously active in the capital market, and following its public offering, it continued to carry out private placements of shares and bonds among institutional investors. ALTEO is a dynamically developing company committed to sustainability, and is always on the lookout for new opportunities for investment and growth, and the Company is continuously working to ensure that they provide their customers and partners with the most innovative range of services of the highest quality in an effort to achieve a steady increase in shareholder value.

Press enquiries: Next9 Communications Beáta Híves beata.hives@nextg.hu