One of the most important features of Levent Sekoya Plaza building is the importance given to the health and comfort of the building users. This issue, which was given great importance also within the scope of the LEED evaluation system, was handled carefully within the project. The amount of fresh air delivered to the spaces inside the building, where 100% fresh air systems are used, has been kept well above international standards (ASHRAE 62.1). F7 type high performance filters are used in air handling units, and any dirt and dust are prevented from entering the air ducts, which are very carefully protected during manufacturing. In addition, with the flush-out works, the possible pollution was cleaned without settling in the building.