What is the total minimum area requirement for soffit vents in a standard gable or hip roof design expressed as?

The correct choice reflects the commonly accepted ventilation guidelines for attics and roofs. A minimum area requirement of 1/900 of the total ceiling area for soffit vents ensures adequate airflow that facilitates temperature regulation and prevents moisture buildup in the attic space. This ratio allows for sufficient air exchange, which is critical in reducing the risk of mold growth and maintaining the overall integrity of the roofing structure.

Soffit vents play a vital role in creating a balanced ventilation system when paired with roof vents or ridge vents, promoting the effective expulsion of hot air and allowing cooler air to enter through the soffits. Ensuring the correct venting ratio helps to maintain optimal environmental conditions within the attic, leading to improved energy efficiency and longevity of the roof system.

The other options represent ratios that fall below the recommended minimum standard for adequate ventilation in residential structures, which could result in insufficient airflow.