How many CFM are in one ton of air conditioning?

One ton of air conditioning is typically associated with a cooling capacity of 12,000 BTUs per hour, and the general guideline used in the HVAC industry is that a ton of air conditioning requires approximately 400 CFM (cubic feet per minute) of airflow. This figure is often endorsed because it provides a balanced approach to effectively distribute the cooling load without causing issues such as inadequate airflow or excessive noise.

The allowance of +/- 50 CFM serves to account for variations in system efficiency, ductwork design, and other factors that can influence airflow in real-world applications. Thus, acknowledging this range indicates that while 400 CFM is the standard, flexibility exists in both directions to accommodate specific system needs or conditions.

Understanding this relationship between tonnage and CFM is crucial for HVAC professionals when sizing systems and creating comfort in conditioned spaces. Accurate airflow not only improves system performance but also enhances energy efficiency and indoor air quality.