Solder Fume Extractor CFM Calculator
Local extraction airflow for a soldering station.
Enter your values
Enter the nozzle distance in in.
Enter the number of stations you are working with.
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.
- 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
At a glance
| What it does | Local extraction airflow for a soldering station. |
|---|---|
| Category | HVAC & Airflow |
| Inputs needed | Nozzle distance, Number of stations |
| Main output | Airflow per station |
| Formula | CFM scales with nozzle-to-source distance squared |
| Cost | Free — no sign-up, no download |
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.
Inputs explained
- Nozzle distance(in)
- Enter the nozzle distance in in.
- Number of stations
- Enter the number of stations you are working with.
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.
What do I need to enter into the Solder Fume Extractor CFM Calculator?
Just 2 values: nozzle distance, number of stations. 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 Solder Fume Extractor CFM Calculator work out the answer?
Bench soldering fume extraction typically needs 15-40 CFM per station through a nozzle positioned within 6-8 inches of the solder joint. It applies the formula CFM scales with nozzle-to-source distance squared and shows the working so you can check each step by hand.
Is the Solder Fume Extractor 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.