The company`s history

Our story began in 1976 when Rudi Kronovšek developed the first domestic hot water heat pump. Since then, we have persistently continued to pursue innovative solutions in the field of heat pumps.

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RUDI KRONOVŠEK, founder of the company KRONOTERM d.o.o. (formerly Termo-tehnika d.o.o.)

In the early 1970s, during the first energy crisis that affected the world, Rudi initiated the production of domestic hot water heat pumps in the company where he was employed at the time. Later, he decided to embark on an independent path in the development of heat pumps, convinced of their crucial role in addressing future energy challenges.



In 1990, Rudi and Cvetka founded the company Termo-tehnika d.o.o. with a vision to follow new trends and provide high-quality, sustainable products. Cvetka was the first to encourage Rudi to pursue his dreams.

laboratorij 1995

In a smaller building, Rudi and his colleagues developed a new generation of domestic hot water heat pumps. The initial series were modular, designed for assembly on boilers, particularly for the Lentherm Invest boiler factory. The initial production ranged between 70 and 100 units per year. With acquired knowledge in cooling systems, the company expanded into other programs, including cooling technology for wine.

In the second half of the 1990s, the company expanded its range with modern domestic hot water heat pumps. They increased the number of employees and focused on marketing, resulting in a 30-40% annual production increase. In 2004, they signed a contract to supply heat pumps with a major European boiler manufacturer.

In 2010, Rudi Kronovšek handed over the company’s leadership to his son, Bogdan Kronovšek.


The year 2013 marked a turning point with the creation of the new brand KRONOTERM. Two years later, the company moved to a modern building near the previous location.

In 2017, the company rebranded as KRONOTERM and refreshed its visual identity. The new building, the changed name, and updated image contributed to the success in 2019 when they introduced the innovative ADAPT heat pump.

Through the development of the ADAPT heat pump, KRONOTERM set new industry standards, particularly in aesthetic design and exceptional silence. ADAPT served as the foundation for new generations of quiet, impeccably designed, and efficient heat pumps, including the VERSI heat pump introduced in 2021. This diversity enabled the company to penetrate new markets and segments. Today, KRONOTERM successfully markets its products across Europe, notably in Italy, Austria, and Switzerland.


Looking at our successful journey, which began with an innovative idea and continues with constant development and innovation, we can confidently assert that we will strive to remain a leader in our industry in the future.

Interview with Rudi

How it all started.

Rudi’s vision from 1976

Read more