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Cheap, awesome, $30 Air Filter.

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So I had an idea for a cheap air filter the other day that has worked out unbelievably great, really moves alot of (now fresher) air. Perhaps someone here could get some use out of it!

A 20x20 Box Fan.
A 20x20 3M Furnace Filter (The activated charcoal filter one works great).
Some Duct Tape.

Altogether about $30 at Wal-Mart. Tape the filter on the back of the fan, (not the front) and voila! A cheap, DIY air filter that'll compete with high-end, several hundred dollar models.

[Thumbnail for Cheap-Air-Filter.jpg]
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Location: Zone 6b
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We have one person in this house allergic to dust mites and wood smoke. It takes Filtrete Elite 2400 3m filters from Lowe's on the furnace, and a IQair HealthProPlus with annual purchase of all three filters (pre, charcoal, hepa) to deal with that and my issues with milo when it blooms and when they harvest.

That is a great and simple DIY if you are not at the near asthma end of air quality needed. Nice "Bodge".
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Location: Wisconsin, USA Zone 4b-5a
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I have one of these. I just tied the filter to the fan so it's easy to change, but blocked the spaces that the filter doesn't quite cover with tape.
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