A couple of years ago I was at a popular woodworking store with my brother who was looking for an air filtration unit for his woodshop. They had one on sale for $150.00 so he bought it. We took it back to his shop and mounted it near the ceiling. It was pretty cool. We made some dust and it seemed to do a good job of filtering the air in his 16×32 building. I decided that I wanted one too, only I do things just a little bit different than my brother.
On the way back to my shop, I stopped off at the local hardware store and spent a couple of bucks on a couple of furnace filters. I had a plan. Back at my shop, I hurried into the yard and rummaged through the garbage pile, the scrap iron pile, and a storage shed, finding an old squirrel cage, probably out of a trashed air conditioning unit, a 1/4 horse power dunlap electric motor, a reject cabinet drawer that was on its way to the dump, a couple of fixed louver vents, a piece of extension cord, a couple of scraps of plywood and a length of link drive belt. I hurried inside and went to work. Soon, having shelled out only 2 bucks, I had a new workshop air filtration unit too.
Something else my Shopsmith can do!
-- The Constitution only gives people the right to pursue happiness. You have to catch it yourself. Benjamin Franklin