Please take a look at attached schematic drawing (link to the original drawing in better quality is below drawing).
This is commercial buliding with just a groundfloor. Hatched rooms have no windows (conference room and storage room). All the windows are equiped with supply openings and there is exhaust fan in KITCHEN and WC.
Please tell me how should I ventilate that rooms with no windows (investor doesnt want to have central mechanical supply-extract ventilation). The only way is to use natural ventilation or individual mechanical extract ventilation. Do you think that natural (gravity) ventilation will work in this case?