Corsi-Rosenthal Foundation (DIY) - Corsi-Rosenthal Box

Thanks for the thin wedge acknowledgment. Can’t wait to see other’s disbelief at how good that build is at all around functionality. Don’t think anything can beat it in terms of cost to function. Incredible build, still functioning properly today. I think it might be quieter than my initial db estimate, as I can not tell it’s running most of the time, without putting my hand in front to feel for a breeze. The general noises outside, day or night, tend to be louder than Arctic P14 fans.

Look up Corsi-Rosenthal boxes. We have a 20" C-R box in our front room, and it catches quite a bit of pet hair. I still have to vacuum, but it's a much smaller job than it was before.

A diy [Corsi-Rosenthal box](https://cleanaircrew.org/box-fan-filters/) will last you a lifetime if you buy a good quality box fan. The sum of it is putting a high MERV furnace filter on the intake side of box fan. We run ours on full blast to clear our house whenever there is thick wildfire smoke.

> or roughly ten times cheaper than commercial air purifiers, with quieter operation. That alone is reason enough to look into Corsi-Rosenthal boxes. https://www.youtube.com/watch?v=hIuH-2naozI by the man himself.

Box fan and a furnace filter. Easy, cheap, and one of the most effective solutions. See [see Corsi-Rosenthal box](https://cleanaircrew.org/box-fan-filters/)

This is what we did and the next morning the filter had darkened. Not a scientific measurement but it was removing something that’s for sure!

The best without much competition are Box fans (Will last for decades and decades, no consumer air filter will.) With HEPA filters taped to the back. Or Corsi-rosenthal styled. Cheapest run cost, cheap filters, high volume and high filter power.

[https://en.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal\_Box](https://en.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box) I actually am stopping by home depot to make one of these today. I love my sweet kitty but she's evaporating

Aesthetics don’t matter when you are trying to keep a loved one alive. We have cr boxes in every room of our house. Are they pretty no, but they do help when you are trying to improve air quality to protect loved ones. I use 9 inch fans not 20.