Mini Split Head Airflow Calculator
CFM output for a ductless mini split head by BTU.
Enter your values
ⓘ Live results
Results
- Estimated airflow
- 360 CFM
- Equivalent tons
- 1
- Throw distance guide
- 24 ft typical horizontal throw
Quick answer
Ductless mini split heads typically deliver about 25-35 CFM per 1,000 BTU/hr of rated capacity.
CFM = (BTU/hr / 1000) x CFM per 1000 BTU
How to use the Mini Split Head Airflow Calculator
- 1Look up the indoor head's rated cooling capacity in BTU/hr.
- 2Apply 25-35 CFM per 1000 BTU depending on fan speed setting.
- 3Use the airflow to judge room coverage and required clearances.
Worked example
Using the values the calculator loads with:
Inputs
- Unit capacity12000 BTU/hr
- CFM per 1000 BTU30
Results
- Estimated airflow360 CFM
- Equivalent tons1
- Throw distance guide24 ft typical horizontal throw
Frequently asked questions
Does this match the spec sheet exactly?
Manufacturers publish exact high/med/low CFM — use this as a planning estimate when specs aren't handy.
Ducted mini split?
Ducted units often run higher static and slightly different CFM curves — check the fan performance table.
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.