What do ventilation requirements specify?

Ventilation requirements primarily focus on the amount of outdoor ventilation air needed in a space to ensure indoor air quality and occupant comfort. Proper ventilation is essential because it helps to dilute and remove indoor pollutants, such as carbon dioxide, volatile organic compounds (VOCs), and other contaminants that may arise from various activities within the space. By specifying the quantity of outdoor air needed, ventilation requirements aim to create a safe and healthy environment, conforming to recognized standards and guidelines such as those outlined in building codes and industry best practices.

The other options, while related to ventilation systems, do not capture the core purpose of ventilation requirements. They address different aspects, such as the capacity of systems, available methods of ventilation, and maintenance schedules, but these are secondary to the fundamental need for adequate outdoor ventilation air in any occupied building space.