1. box fan 24" (most stores have these for about $12-$15)
2. Air conditioning/heating filters close to 24" square to be same size as fan... little bigger one way is okay. (hardware store under $5)
3. Cardboard box (mine was 25" x 25" x 8")
4. Duct (duck) tape (hardware store $6)
5. Dowels 1/4" about the size of a pencil, three or four (hardware store, less than $1 each) If you have bamboo rods that will work also.
Step 1: Box:
Open the box and tape the flaps open to make a big cardboard tunnel.
Front top flap... fold all the way back and tape down, otherwise it's kind-a hard to see your work (see image)
Tape inside and out, don't leave any little gaps!
Step 2: Fan:
2. Tape the edges of the box to the fan... you want the fan to draw the air through the box... not suck it through little cracks.
3. Make sure that the fan is pointing/blowing out of the box rather than through the box!
Step 3: Filters:
If you planned right the filters are just small enough to slide inside the box. If they are snug on the sides and a little big on the top and bottom.. that's okay, just angle the filters.
*(Note: I didn't know anything about filters when I did this... I later discovered that better filters will remove smaller particles and some can even remove the bad smell)
Step 4: Poles:
The sticks are to hold the paper, aluminum plate, or whatever you are airbrushing away from the filters and the fan (the fan sucks really good even on the lowest setting)
*(If you want to drill some holes on the vertical sides and put the poles in horizontally... that will work also, just use a clothes pin to hang your paper or other art.)
Step 5: Plug It in and Start Painting...
One other advantage that this has over the plastic tub kind that I have seen is that when the year is over (teaching that is) you can trash all but the fan and save lots of space... Just make a new one the next year.
The only drawback to this... is that isn't not big enough for t-shirt work. It twill works but it's a little awkward. I have since made a bigger better one...
Step 6: Newer, Bigger & Better
It doesn't look like it... but this is pretty much the same thing in a different configuration. I used a box that was roughly 18" x 15" x 36"
I cut the box diagonally from to create two wedge/triangle shapes.
then taped them together to form one bigger wedge/triangle shape
Step 7: Fan
The fan is just taped to the back of the wedge/triangle shape and taped so there are no holes for air to get sucked through.
This design is a little different in that the fan is straight up and down... I needed to give the fan some breathing room so I took two paper towel tubes and taped them on the bottom corners of the wedge/triangle shape. Now the fan can dissipate the air better.
Step 8: Sticks
I cut a little notch in the edges and the middle of the wedge/triangle shape, slid the bamboo sticks in and taped them down. (I use large paper clips to hold the paper in place when painting)
Step 9: Filters (+$4-$5)
the filters are just big enough to cover the hole that leads to the fan but small enough to fit in the box (The filters are 14" x 21" x 1"). You can use bigger, thicker, more expensive filters it just depends on how much you want floating around your room. If you are painting in a one room apartment you might want thicker, better filters and add a charcoal filter for the smell.
I taped them in using the yellow duct (duck) tape forcing all the over spray to go into the filters rather than around them.
Overall this set up works really well for larger things. If you only do model cars or smaller stuff... stick with the other one. I would recommend upgrading the filters for better filtration.