Here is a little dust filter clamp I made with my Rockwell Bladerunner. You can use this magnetic clamp to attach a 20x20 dust filter to most box fans. You can make this w
ith scrap wood and the simplest of shop or home hand tools. I used two neodymium hard drive magnets to attach the clamp to the fan and some polyester resin to attach the magnets. It was a very fun project.
The Rheem 20x20 #4 FPR filter was only $4.47 at Home depot.
I used less than a dollars worth of resin, glue and screws to make the clamp and feet. The wood was scrap as were the magnets. I did not include the cost of the fan which I assume you have if you are building a filter for one.
I used a hand drill
hammer
Rockwell Blade runner
You can use a hand saw and a coping saw or a jig saw instead.
4 wood screws.
2 ounces of polyester resin and 34 drops of hardener
8 brads to attach the magnets
wood chisel
screw driver
soft pine scrap wood
scrap wood yardstick
wood glue for wood joints
Gorilla glue to attach the wood feet to the fan
sandpaper
needle nose to break off ends of brads that piece the front of the wood
metal file to file down stubs of brads
tape measure and straight edge
marking pen- should have used pencil, easier to remove marks
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