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The original was posted on /r/crboxes by /u/No-Pudding-9133 on 2024-01-14 17:46:13.

I’ve seen the sentiment a few times that cr boxes are overal better than hepa air purifiers you can get in store or online. My biggest question is, how could you possibly know? CR boxes are individually made and have individual flaws because they’re not manufactured, plus from what I know there aren’t any studies on it’s actual efficacy. So how could you know it’s better if there aren’t any studies to back it up? Am I wrong? Are there studies about efficacy and margin for human error that I don’t know about?

Update: thank you all for your helpful comments and links to articles. You have given me like it reading to do, but I look forward to learning more!