Walk-In Cooler CFM Calculator
Evaporator airflow for a walk-in cooler.
Enter your values
ⓘ Live results
Results
- Evaporator airflow
- 350 CFM
- Equivalent BTU/hr
- 24,000
- Fans at 800 CFM each
- 1
Quick answer
Walk-in coolers typically need about 150-200 CFM of evaporator airflow per ton of refrigeration for even temperature distribution.
CFM = tons x CFM per ton
How to use the Walk-In Cooler CFM Calculator
- 1Get the refrigeration load in tons from the case or box spec.
- 2Apply 150-200 CFM per ton depending on product density and door frequency.
- 3Split airflow across multiple evaporator fans for even coverage.
Worked example
Using the values the calculator loads with:
Inputs
- Refrigeration load2 tons
- CFM per ton175 CFM/ton
Results
- Evaporator airflow350 CFM
- Equivalent BTU/hr24,000
- Fans at 800 CFM each1
Frequently asked questions
What if the box has dense stacked product?
Use the higher end of the range so air can still reach between pallets.
Freezer instead of cooler?
Freezers usually run lower CFM per ton due to lower air density at low temperature.
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.