TANGRA participated in the event of the campaign "Do You Know What You Are Breathing?", dedicated to the indoor climate in schools and kindergartens, held at the Sofia Municipality building on November 30, 2023. The event was supported by the Mayor of Sofia, Mr. Vasil Terziev, and featured a special guest, Ms. Marieta Georgieva (Deputy Minister of Education and Science). Representatives from municipal, state, and educational institutions, as well as campaign partners, attended the meeting. Ventilation solutions for fresh and clean air in schools and kindergartens were presented by Ivan Armyanov, Head of the Technical Department at "TANGRA – AV" Ltd.
