Lego plant inaugurated by Hungary Prime Minister Mr. Viktor Orban. The 122.000 square meters new greenfield plant of the construction toy manufacturer was completed in only a year and is one of the most state-of-the-art production plants in the world. Kalor-Center Kft. was the main subcontractor for EPC contract of Lego plant’s CCHP Power Plant. Kalor-Center Kft. stays here for another year as oprator of the Power Plant.