I built a custom case with a rotated motherboard like this, with a huge furnace filter on the intake and 8 fans (well in excess of what's needed for cooling) to clean my room air.

Or, to put that another way, you built an air purifier, and then embedded a computer into it.

People like you are why hackers/engineers have a reputation.

Bravo:)

Pics please

Very old photos; I've replaced all the hardware you see except the SSD, wi-fi card, and the power supply.

https://imgur.com/a/u1Ti7

Very cool, thank you! How's the noise after you switched the fans?

I switched first to Gentle Typhoons, then the new Noctua NF-A12×25.

The cheap-o original fans were quiet at low speed but hardly moved any air, and at high speed they made tons of wind noise; I think the airfoils were stalling or something.

The Gentle Typhoons were reasonably wind-noise quiet even at high speed, but made a high-pitched hissing from the bearings at all speeds, and a groaning rumble from the motors at low speed.

The Noctuas are much quieter at 1000 rpm, almost inaudible relative to the 4 hard drives, and make fairly innocuous white noise at high speed.

Since we’re on the topic of computer hacks, I turned off the heat in my room and farmed litecoin for a winter with my PC. My room was warm and toasty, and I sold the litecoin and bought a new video card!

I also currently have my home server in a closet with the seeds I’m starting so the soil stays around 80 degrees (f).