What does cubic feet per hour required by ordinance measure?

The measurement of cubic feet per hour required by ordinance specifically refers to the necessary air volume for fresh air changes within a building. This value determines how much fresh air must be introduced into a space to ensure proper ventilation, which is critical for maintaining indoor air quality and occupant health.

Building codes and ordinances establish these requirements to regulate how much fresh air is needed to dilute indoor pollutants, control humidity, and provide a comfortable environment. By specifying a cubic feet per hour metric, it allows for quantifiable ventilation that can be uniformly applied across various building types and uses. This ensures that all buildings adhere to minimum standards necessary for occupant safety and comfort, rather than relying on subjective assessments or inadequate airflow.

Understanding this concept is crucial for architects and designers, as compliance with local codes not only promotes health and safety but is also a key consideration in the design and mechanical systems of the building.