What is the maximum distance between a ventilating opening in an under-floor space and each corner of the building?

The maximum distance between a ventilating opening in an under-floor space and each corner of the building is established to ensure adequate ventilation and air circulation. Meeting this requirement helps prevent moisture accumulation and improves air quality beneath the structure, which is crucial for maintaining the integrity of the building and safeguarding against issues like mold growth.

In most building codes, the specified distance of 3 feet is aimed at providing sufficient airflow throughout the under-floor space. It ensures that corners, which can often be dead spaces with limited air movement, receive adequate ventilation. This distance also balances practical construction considerations with the need for effective air exchange.

Adhering to this requirement is important for compliance with safety codes and standards, thereby protecting the building and its occupants from potential hazards associated with inadequate ventilation.