How can CFM's be converted into tons?

The conversion of CFM (Cubic Feet per Minute) to tons of cooling capacity is based on the understanding that one ton of air conditioning is defined as the ability to remove 12,000 BTU (British Thermal Units) of heat per hour. The relationship between airflow and cooling capacity is established through the concept of sensible heat, which states that, under ideal conditions, it takes approximately 400 CFM of airflow to produce one ton of cooling.

To calculate the cooling capacity in tons from CFM, you can use the formula where you divide the CFM by 400. This formula reflects the standard rule of thumb in the HVAC industry, allowing for a relatively straightforward conversion:

• 1 ton of cooling = 12,000 BTU/h

• If you have 400 CFM, this indicates that you can effectively transfer about 1 ton of cooling.

Thus, by dividing the CFM value by 400, you arrive at the amount of cooling in tons that corresponds to that airflow rate. This understanding is essential for HVAC professionals when sizing equipment, designing ductwork, and ensuring adequate cooling for residential and commercial spaces.