BOX FAN AIR FILTER For About $40! (How To Build a DIY Box Fan Air Purifier With HVAC Filters!)

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BOX FAN AIR FILTER For About $40! (How To Build a DIY Box Fan Air Purifier With HVAC Filters!)

Fine sawdust floats around in every workshop, potentially causing lung-related health problems. Most dust collectors and shop vacs fail to collect it all. This short video from The Honest Carpenter will show you a great way to turn an average box fan into a homemade air filter/purifier!

Large, single-stage dust collectors are great for picking up wood chips and sawdust--but they're actually prone to pumping fine dust back out into the air.

Also, they're not great for tools smaller than shop planers, joiners and cabinet saws.

Shop vacs, on the other hand, work really well with those tools, because they draw a lower volume of material at a much higher pressure.

However, it can be hard to bring the suction close to the source of the dust--the blade or cutter head. Therefore, a lot of dust both coarse and fine gets blasted out into the room.

This dust can cause lung problems both immediate and chronic!

The best, most affordable way to trap this fine dust is with a homemade box fan air purifier/filter.

You can make these units with just an average 20"X20" box fan, and a couple home HVAC air filters.

I used two 16X20 filters for my box fan air filter. I just built a 1/2" plywood frame with cradles and slides for the filters, and lower lip at the front for the box fan to sit on.

Then, I duct-taped the air filters to the plywood frame to create better draw and suction.

In just twenty minutes, a box fan air filter/purifier can complete multiple full cycles of a small workshop, drastically cutting down on the airborne particulates!

Thanks for watching!

The Honest Carpenter