DIY a cheap, but very effective, air purifier/filter

Hi Friends,

This past summer we had another season of pretty intense wildfire smoke up here in Minnesota. Some of the smoke blows down from Canada and some of it is from fires here in the US. But you can use this air purifier any time, not just when the wildfire smoke is bad. And, depending on the type of filters you use, it can be one step below having a giant N95 in your home.

Materials list:

1 roll of painter's masking tape, shipping tape, or duct tape

1 box fan (the one in this video is 20 inch square)

1 furnace filter the same size as your box fan (20x20x1)

That's it!

4:29

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