With the recent wildfires and the gestures broadly at the world I just wanted to share this link to the Corsi-Rosenthal Box. A simple homemade air filter that can be made with a box fan or several computer fans using off the shelf merv 13 or higher filters from your local store.
Yes, these have existed since before COVID. I had someone elsewhere get made at me because “it shouldn’t be named that! Those two didn’t invent it!” but like, I didn’t choose the name lol. Anyways, I’ve made two for my house (former hoarder house we inherited and we haven’t had the ducts cleaned yet but everything else is clean) and I can say, we both sleep better at night and they worked great through the wild fires.
Anyways, just wanted to share this as a quick little easy project. Or you know, not so quick if you wanna be like the people on Reddit’s r/CRBoxes who 3D print fancy housings and do elaborate computer fan builds. Whichever you prefer.
Edit to add: Someone posted a Build Guide (non Reddit link) on Reddit for making boxes with PC fans.
I know we don’t love Reddit links but
- Here’s a Reddit post for a DIY/buy guide
- An Information post
- A tall computer fan box
- Triangle box fan
Sorry for the Reddit links, they just have a lot of conversations going on there currently.
It does not work well. The dramatically reduced airflow means the fan is working hard for basically nothing.
However, if you are gunna go through the trouble of making a cube anyway, you can make one out of thin strips of wood or multi-layer laminated cardboard, and attach washable air filter material all around it with Velcro dots or magnets, and you never have to rebuild it or replace the filters. Just wash it with a sprayer of some sort (hose, shower, sink) once every few months.
My bad, deleted my comment because I realized I was saying basically what you were (because I can’t read today lol)
deleted by creator