These are great, but if you’re looking for something slightly less bulky, there’s a dude selling kits online using pc fans. I’ve got two and they’re pretty much a CR box in its final form. Kits come with laser cut panels, fans, grates, etc. only need to supply two filters. Way quieter than a box fan. They’re a bit pricey but worth since they can pretty much be placed anywhere.

google clean air kits.

Y’all voted for them. This is what they’re doing.

Yeah but your ISP knows someone at your address is consuming a metric ton of corn.

Easel. But we understood. 😀

Baby shark