What is the recommended CFM for a bathroom fan?

The recommended airflow for a bathroom fan is typically around 50 CFM (cubic feet per minute). This level is generally sufficient for most standard-sized bathrooms to effectively remove moisture and odors, helping to prevent issues such as mold growth and maintaining indoor air quality.

A bathroom fan needs to balance efficiency with the capability of adequately exchanging air in the space. For bathrooms that are up to about 100 square feet, a fan rated at 50 CFM meets the requirement to maintain proper ventilation. This helps ensure that any excess humidity generated from activities like showering or bathing is effectively exhausted from the bathroom.

Larger or more complex bathrooms may require fans with higher CFM ratings, but for general use, 50 CFM serves as a practical and efficient standard for ventilation in most setups. This context clarifies why this choice is appropriate based on the typical need for airflow in these environments.