How do you convert CFM to an estimated leak area?

To convert cubic feet per minute (CFM) to an estimated leak area, dividing CFM by 10 is the appropriate method. This conversion is based on an assumption of a typical pressure drop and can be used to estimate the leakage area in square inches that corresponds to a given airflow rate measured in CFM.

When airflow is calculated, particularly in the context of building science and energy efficiency assessments, it's important to understand how CFM relates to the physical size of leaks in the building envelope. Dividing CFM by 10 provides a simplified approach to estimate the effective leakage area based on standard airflow measurement practices. This is particularly useful for building analysts when assessing the tightness of a building or planning for air sealing measures.

The other options do not provide a viable method for converting CFM to leak area based on established practices.