Solder Fume Extractor CFM Calculator
Local extraction airflow for a soldering station.
Enter your values
ⓘ Live results
Results
- Airflow per station
- 33.8 CFM
- Total system airflow
- 33.8 CFM
- Recommended distance
- 4-6 in from the joint
- Filter type
- Activated carbon + HEPA for rosin/flux fume
Quick answer
Bench soldering fume extraction typically needs 15-40 CFM per station through a nozzle positioned within 6-8 inches of the solder joint.
CFM scales with nozzle-to-source distance squared
How to use the Solder Fume Extractor CFM Calculator
- 1Enter the intended nozzle distance from the solder joint.
- 2Enter the number of stations sharing one extraction system.
- 3Keep nozzles as close as practical since capture falls off sharply with distance.
Worked example
Using the values the calculator loads with:
Inputs
- Nozzle distance6 in
- Number of stations1
Results
- Airflow per station33.8 CFM
- Total system airflow33.8 CFM
- Recommended distance4-6 in from the joint
- Filter typeActivated carbon + HEPA for rosin/flux fume
Frequently asked questions
Why not just use a fan?
A fan moves air around the room without capturing fume at the source, which does little to protect the operator's breathing zone.
Do I need ducting to outside?
Small benchtop units with carbon/HEPA cartridges can recirculate filtered air; larger production lines usually duct outside.
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.