What minimum ventilation airflow rate is needed in cubic feet per minute to maintain required conditions in an enclosed parking garage floor area?

In the context of maintaining proper ventilation in an enclosed parking garage, the necessary airflow rate is critical for ensuring safety and comfort. A minimum ventilation airflow rate of 0.05 cubic feet per minute (CFM) per square foot of floor area is standard for parking garages. This rate is established to dilute vehicle exhaust emissions effectively, which can include harmful pollutants like carbon monoxide and nitrogen oxides.

Choosing this specific airflow rate helps ensure a safe environment for both vehicles and people using the garage. It strikes a balance between energy efficiency and the need for adequate air quality. The other options represent either insufficient airflow rates or rates that exceed typical requirements, potentially leading to unnecessary energy consumption without a corresponding benefit in air quality or safety.