#576 Spray Booth
Building a $10 spray booth for light airbrush spray painting and soldering.
Here’s a quick demo..
Quality commercial spray booths can be quite expensive (starting from over $125 locally), but they can be value for money, offering strong airflow and quality construction.
But perhaps a more modest solution will suit my more modest needs - basically for fume extraction for soldering and light, small scale airbrush spray painting.
There are many examples of DIY spray booth construction just an internet search away. Here are a few I checked out.
DIY Airbrush Spray Booth Setup & Build (frostedsnow)
I Finally Built Myself an Airbrush Spray Booth!
Airbrush Spray Booth Build
Make a foldable painting booth!
OK, I’m going super cheap. My only new purchase was the fan (~$3) and filter ($2), the rest scavenged from parts bins and the trash:
- an old cardboard box 20cm (H) x 27cm (W) x 43cm (L)
- 120x25mm 12V DC brushless fan (1800rpm, probably only about 60cfm)
- Daiso 20cm x 20cm ventilation port adhesive filter
- 36 LEDs - cool white 12V LED strip
- 18 LEDs - warm white 12V LED strip
- 12V 1A+ power adapter
- 2 panel-mount SPST switches
- 5.5mm x 2.1mm panel-mount DC jack
- some wire
- some masking tape
- a small plastic project case for the junction box
Testing the components:
- the LEDs draw about 260mA at 12V. The mix of cool and warm white produces a very clear and comfortable light.
- the fan draws about 290mA at 12V. It isvery quiet - acoustically and electrically. No voltage spikes at startup or stop, so no need for additional smoothing and supression components.
Thus a very simple circuit:
Inside the junction box:
Rear view with fan and junction box attached:
There are three main factors to consider:
- airflow (volume/time)
- filtering requirements
- where and how to vent the exhaust
Actual requirements will depend on the the toxicity and volume of aerosols being released.
Since I am only dealing with low volumes of solder flux fumes and generally non-toxic water-based acrylic paint, I’m keeping this simple and probably under-engineered:
- airflow: I’ve seen 200cfm+ being mentioned as ideal for airbrush work. For now I’m using a very quiet 120x25mm DC brushless fan that only moves about 60cfm)
- filtering: since I’m not dealing with high volumes of toxic material, my main concern is supressing dust and paint so I’m using a cheap household grade filter
- vent: I don’t live in a house or climate that allows easy direct venting to the outside, so this is strictly for indoor use and only to move fumes from the immediate vicinity
If I needed to upgrade this to deal with larger volumes of fumes or more toxic materials, I would probably (a) find another place to do this other than in the home and/or (b) replace the exhaust system with an industrial inline fan with ducting to extract and vent to the outdoors.
Some typical DC brushless fan specs:
|size||Speed||Air Flow||Noise (dBa)|
|40x10mm||5000RPM||5CFM , 0.14m3/min||33dBa|
|50x10mm||4500RPM||7CFM , 0.23m3/min||32dBa|
|60x25mm||3600RPM||22CFM , 0.62m3/min||31dBa|
|80x25mm||3000RPM||43CFM , 1.22m3/min||31dBa|
|120x25mm||2000RPM||70CFM , 2.00m3/min||33dBa|