A simple and effective DIY air filter

DMS General
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This was mentioned on TV by a lady has a an environmental pollution I believe. She said it is she said it is very and not overly overlay expen

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I passed this on to a few teacher friends. Thank you for the info. It’s much appreciated.

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I wonder if something like this blowing at the air return in the woodshop may help prevent the A/C from freezing…

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3M tested the design and validated that it works well!