Woodworking Tip: Box Fan Filter I made a cheap air cleaner for dust in my shop by attaching a furnace filter to a box fan. I just set the fan on my workbench whenever I’m sanding. It works so well that I decided to make a more permanent air cleaner. I mounted the fan overhead, attaching it to the floor joists in my shop, see drawing.

Woodworking Tip: Box Fan Filter I made a cheap air cleaner for dust in my shop by attaching a furnace filter to a box fan. I just set the fan on my workbench whenever I’m sanding. It works so well that I decided to make a more permanent air cleaner. I mounted the fan overhead, attaching it to the floor joists in my shop, see drawing.

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