Evaporator Airflow Per Ton Calculator
CFM per ton for an evaporator coil.
Enter your values
ⓘ Live results
Results
- CFM per ton
- 400
- Assessment
- Within typical comfort-cooling range
- Sensible heat ratio implication
- Balanced sensible/latent
Quick answer
Standard comfort-cooling evaporator coils are designed around 350-450 CFM per ton, with refrigeration coils often lower.
CFM per ton = airflow / tons
How to use the Evaporator Airflow Per Ton Calculator
- 1Measure or take the design airflow across the coil.
- 2Divide by the coil's rated tons of cooling.
- 3Compare against the 350-450 CFM/ton comfort cooling benchmark.
Worked example
Using the values the calculator loads with:
Inputs
- Measured or design airflow1200 CFM
- Cooling capacity3 tons
Results
- CFM per ton400
- AssessmentWithin typical comfort-cooling range
- Sensible heat ratio implicationBalanced sensible/latent
Frequently asked questions
What about refrigeration coils?
Refrigeration and dehumidification-focused coils run lower, often 100-250 CFM per ton.
Why does low CFM/ton risk frosting?
Too little airflow lets coil surface temperature drop below freezing, icing the fins.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.