Walk-In Cooler CFM Calculator
Evaporator airflow for a walk-in cooler.
Enter your values
Enter the refrigeration load in tons.
Enter the cfm per ton in CFM/ton.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- 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
At a glance
| What it does | Evaporator airflow for a walk-in cooler. |
|---|---|
| Category | HVAC & Airflow |
| Inputs needed | Refrigeration load, CFM per ton |
| Main output | Evaporator airflow |
| Formula | CFM = tons x CFM per ton |
| Cost | Free — no sign-up, no download |
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.
Inputs explained
- Refrigeration load(tons)
- Enter the refrigeration load in tons.
- CFM per ton(CFM/ton)
- Enter the cfm per ton in CFM/ton.
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.
What do I need to enter into the Walk-In Cooler CFM Calculator?
Just 2 values: refrigeration load, cfm per ton. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Walk-In Cooler CFM Calculator work out the answer?
Walk-in coolers typically need about 150-200 CFM of evaporator airflow per ton of refrigeration for even temperature distribution. It applies the formula CFM = tons x CFM per ton and shows the working so you can check each step by hand.
Is the Walk-In Cooler CFM Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.