In HVAC systems airflow is commonly expressed in CFM (Cubic Feet per Minute), while cooling capacity is measured in tons of refrigeration.
1 Ton of Cooling ≈ 400 CFM Airflow
This rule is widely used for quick airflow estimation during duct design and equipment selection.
CFM = Ton × 400
Ton = CFM ÷ 400
2 Ton AC → 800 CFM Airflow
1200 CFM Airflow → 3 Ton Cooling Capacity
This calculator helps HVAC engineers quickly convert between airflow and cooling capacity.
The standard HVAC rule is approximately 400 CFM per ton of cooling capacity.
A 3 ton air conditioning system typically requires about 1200 CFM airflow.
Proper airflow ensures efficient cooling, prevents coil freezing and improves HVAC system performance.
Yes. Incorrect airflow can reduce cooling efficiency and increase energy consumption.