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by rapunkill 1478 days ago
Not a new idea[1] I'm surprised it even has a name [1] https://www.youtube.com/watch?v=Uzpn09OIyqw
1 comments
jefftk 1477 days ago
That's not the same concept: that requires tools and woodworking skill. A CR filter cube requires only a box fan, duct tape, filters, and the box the filters came in.
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