Steam Room Ventilation Calculator
Exhaust airflow for a commercial steam room.
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ⓘ Live results
Results
- Continuous exhaust airflow
- 29.2 CFM
- Air changes per hour
- 5
Quick answer
Steam rooms typically run a continuous exhaust of about 1 CFM per 10-15 cubic feet of room volume to manage humidity and mildew.
CFM = volume / coverage factor
How to use the Steam Room Ventilation Calculator
- 1Calculate the steam room's internal volume.
- 2Divide by a coverage factor of 10-15 cubic feet per CFM.
- 3Run the exhaust fan continuously, not just during occupancy, to prevent mold.
Worked example
Using the values the calculator loads with:
Inputs
- Room volume350 cu ft
- Coverage (cu ft per CFM)12
Results
- Continuous exhaust airflow29.2 CFM
- Air changes per hour5
Frequently asked questions
Does the fan run during steam generation?
Typically yes at reduced rate, then ramps up after use to dry the room.
Corrosion-resistant equipment?
Yes — steam rooms need moisture-rated fans, ductwork and controls throughout.
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.