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I Made a Quieter Air Purifier

https://chillphysicsenjoyer.substack.com/p/i-made-a-quieter-air-purifier
19•crescit_eundo•5d ago

Comments

runariot•5d ago
Why do computer fans blow air inside?
brtv•35m ago
I think this done to create a slight overpressure which helps keep the dust out.
pixl97•33m ago
Your question isn't very clear... Is it why do they use computer fans? (My guess is that is what they had). Or is it why do you blow instead of suck?
chr-s•29m ago
You want to suck air through the filters rather than blow into them. For one, this keeps the fans cleaner but also it's more efficient, reducing turbulence inside the box.

https://old.reddit.com/r/crboxes/ is a good resource if you're looking to make your own. There's been a general shift from large box fans to PC fans because their performance/noise ratio is better.

calvinmorrison•22m ago
Corsi-Rosenthal... they taped some filters to a fan, something the poor folk have been doing forever and academia acts like they invented fire. It's caveman technology with a fancy name.

embarassing

scosman•21m ago
I had the same insight for in-home air movement. Purpose built inter-room fans from broan/etc are 3x louder and several times more expensive than computer fans at the same CFM. I've been very happy with them.

https://scosman.net/blog/using_in_wall_computer_fans_for_hom...

lozenge•8m ago
There are continuous extraction fans, they're called dMEV systems. Eg https://www.epicair.co.uk/products/vent-axia-lo-carbon-reviv...

There's also systems which can move air both ways through the whole house - https://www.ventilation-alnor.co.uk/index/support/alnor-know...

Your DIY solution looks a lot cheaper though.

erwincoumans•9m ago
I wonder if they used silent computer fans? I love the quiet Noctua fans, and replace all noisy fans with them: fans in pc, wifi router, playstation 5, mister fpga, robots, jetson orin etc.

Advent of Code 2025

https://adventofcode.com/2025/about
425•vismit2000•5h ago•163 comments

Windows drive letters are not limited to A-Z

https://www.ryanliptak.com/blog/windows-drive-letters-are-not-limited-to-a-z/
212•LorenDB•4h ago•74 comments

LLVM-MOS – Clang LLVM fork targeting the 6502

https://llvm-mos.org/wiki/Welcome
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The Thinking Game Film – Google DeepMind Documentary

https://thinkinggamefilm.com
85•ChrisArchitect•2h ago•48 comments

Migrating Dillo from GitHub

https://dillo-browser.org/news/migration-from-github/
159•todsacerdoti•4h ago•99 comments

ETH-Zurich: Digital Design and Computer Architecture; 227-0003-10L, Spring, 2025

https://safari.ethz.ch/ddca/spring2025/doku.php?id=start
16•__rito__•48m ago•0 comments

CachyOS: Fast and Customizable Linux Distribution

https://cachyos.org/
202•doener•7h ago•190 comments

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https://www.youtube.com/watch?v=9HIy5dJE-zQ
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https://www.ycombinator.com/companies/retailready/jobs/KPKDu3D-associate-product-manager
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171•antiochIst•4d ago•41 comments

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https://cs193p.stanford.edu/
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5•giuliomagnifico•56m ago•0 comments

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230•saubeidl•4h ago•107 comments

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https://zigtools.org/blog/zigbook-plagiarizing-playground/
413•todsacerdoti•14h ago•114 comments

Don't push AI down our throats

https://gpt3experiments.substack.com/p/dont-push-ai-down-our-throats
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The Easiest Way to Build a Type Checker

https://jimmyhmiller.com/easiest-way-to-build-type-checker
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Langjam Gamejam: Build a programming language then make a game with it

https://langjamgamejam.com/
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What's Hiding Inside Haribo's Power Bank and Headphones?

https://www.lumafield.com/first-article/posts/whats-hiding-inside-haribos-power-bank-and-headphones
150•rozenmd•3d ago•51 comments

RL is more information inefficient than you thought

https://www.dwarkesh.com/p/bits-per-sample
96•cubefox•3d ago•29 comments

The space of minds

https://karpathy.bearblog.dev/the-space-of-minds/
58•Garbage•8h ago•22 comments

I Made a Quieter Air Purifier

https://chillphysicsenjoyer.substack.com/p/i-made-a-quieter-air-purifier
21•crescit_eundo•5d ago•8 comments

Meshtastic

https://meshtastic.org/
260•debo_•17h ago•68 comments

Landlock-Ing Linux

https://blog.prizrak.me/post/landlock/
257•razighter777•21h ago•104 comments

NixOS 25.11 Released

https://nixos.org/blog/announcements/2025/nixos-2511/
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The HTTP Query Method

https://www.ietf.org/archive/id/draft-ietf-httpbis-safe-method-w-body-14.html
243•Ivoah•4d ago•108 comments

Datacenters in space aren't going to work

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431•mindracer•1d ago•366 comments

Learning Feynman's Trick for Integrals

https://zackyzz.github.io/feynman.html
249•Zen1th•22h ago•34 comments