The business center “Rent House” is situated in a central part of the city not far from Lybidska metro station. The building has a class of B+, and its total area is 5247 m2. The ventilation system is based on duct fans which in total has an airflow of 30 000 m3/h. The duct system is a compact solution for zone ventilation. LG air curtains help separate the different ventilation zones, making it possible to have open doors without any drafts or significant heat loss.