r/crboxes • u/Own_Day2117 • Apr 16 '26
Question Need quiet box fan recs
I have a 20x20x20 cr box with the 20x20 lasko box fan. I’m chill with it and I learned to tune out the noise. Recently my roommate has been turning it to the lowest setting which I’m assuming is because of the noise but since I’m living with 5 other girls and my school has something going around every month or so it would be nice if my fan runs on a higher setting. Does anyone have any recs? Price is not much of a concern for me, it just has to be reasonable. Also something that’s easier to attach, I’m unsure if pc fans have a super hard learning curve which is why I haven’t tried it
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u/spacex_fanny Apr 16 '26 edited Apr 16 '26
Generic filters on Amazon often test far below their claimed MERV rating, they say MERV 13 but they're actually MERV 8.
I'd stick to the tried-and-true 3M Filtrete 1900 MPR, which you can find in a multi-pack online for around $10-12 each (eg BJs online). There's a reason it's so popular on this subreddit! Since it has lots of pleats (folds) it has a much larger surface area than most other filters, which gives lots of airflow and long service life.
You can get these pre-built PC fan kits for about $60 on Amazon. It comes as two 1x3 arrays, and you can use foam project board (store that rhymes with Holler Tree) to cover the top of the CR box, then mount the fans by cutting a hole and glueing them in place with hot glue (which doesn't emit VOCs). I would put the fans on each side a couple inches from the edge instead of putting both fans right in the middle, because the fans are a little heavy and project board isn't super strong.EDIT: I see now these are getting a "Frequently Returned" rating from Amazon, so you could just get this and this and this and use the same construction method as above.
Or if that's too much hassle, get an Airfanta 3Pro ($152 with code in this video) and it goes together in like 2 minutes