What is the recommended air flow per ton of air conditioning?

The recommended airflow for air conditioning systems is typically set at 400 cubic feet per minute (CFM) per ton of cooling. This guideline is based on the average heat transfer requirements of a typical residential or commercial air conditioning system. When 400 CFM is achieved per ton, it ensures that the system operates efficiently, providing optimal comfort while also maximizing energy efficiency. At this airflow rate, the air conditioning unit can effectively remove heat from the indoor environment while maintaining balanced humidity levels, which is essential for overall indoor air quality.

Using 400 CFM per ton also aligns well with standard duct sizing and design practices, ensuring that the system can meet cooling demands without creating excessive noise or drafts. Other airflow rates such as 200, 300, or 500 CFM do not match the conventional design standards, and straying from the 400 CFM can lead to inefficiencies and insufficient cooling, or excessive system strain.