Dear all,

We are working with a project located in a 3C climatic zone. Therefore, our building’s main entrances include a vestibule as mentioned in section 5.4.3.4.

Furthermore, inside the building there will also be small enclosed vestibules that separate the office areas from the bathrooms. Therefore, people will be crossing through these small rooms that work as vestibules to access the bathrooms all day.

Should these spaces require to be ventilated with a minimum outdoor air supply? Or can we just leave them without ventilation since they are merely a transition space where people will be for very short periods of time throughout the day.

Thanks in advance!