Hi, my name is Lee & new to this group. I also live in Houston, Memorial area. I reversed enginered a paint booth. But mine has a very different design than most of the tin stuff they are getting $500+ for. I build mine out of plywood, for the main structure. It has lights above, and on both sides. The booth has 2 entry doors. First it is build in a cube shape. There is a door in the front that opens like a house door. In the center of that door is a 1' plexiglass viewing window,which has tear offs on the inside so when the paint builds on it, I simple tear it off. Trick i learned from racing cars. The other door is on the top of the cube. There are lights mounted under this door. The 6 other lights are halogen, placed on the right & left. These lights also serve as a baking oven for the type paint which benefits from this method. There are also a protective cover for these lights using the same tear away concept as the front window. I think the cube is 3x3. There is a metal screen at the very back. Behind it is the first set if filters. This filter can be bought at walmart. The filter is installed into a custom slot I build between the back if the cube, between the metal screen & a frame holding the filter in between. Now, next I took a standard box fan & tore it apart. I insulated areas needed,as not to catch fire. I custom mounted that at the very end of the cube. I have left out a few steps like the other seris of carbon & secret filters, that are placed before the exhaust fan. I custom built a plastic shroud that covers the fan and used common duct tubing, to divert the very small amount of paint fume out of a window using another custom plexiglass piece that fits in between the window, all you do is close it, and with the use of 2"wide foam tape, it is sealed.
But giving full disclosure, I stopped using the duct exhaust to the window, because the seris of filters do the trick. I have been using it 3 years now. Been tempted to write an article about it, complete with diagrams, photo's and the best thing about it, the cost. Not counting my time the total materal cost is about $150.
Yes, I'm sure I will here it from all the haters, naysayers, and doubters. But, keep in mind the owner of one of the largest and best paint & bodyshops helped me with this. He sponsered my race team for years, but I am in a wheel chair now, so I'm retired and have wayyyy too much time on my hands. I am so new to this forum, I don't even know if you can post pic's. If you can, I will shoot some so those interested can check it out.
PS: I have no, as in zero interest in making a penny with helping anyone interested in making this paint booth, I just like helping folks out.
Respectfully, Lee Barret