More than 400 people participated on the webinar Design of the public address systems (EVAC) held on February 25th 2021. Webinar was organized by Alarm automatika and the Croatian Chamber of Electrical Engineers, which included it in its professional development program. Presentations were about Regulations and standards relevant for the implementation and use of EVAC in Croatia, region and world, about Design and equipment selection with reference to the main elements of the EVAC system and calculations to be made when choosing adequate equipment and about Examples of the EVAC implementation in hotels, public facilities, special facilities and shopping centers.