Jo - pièce de résistanceBest understandable plans I've seen so far to build a corsi-rosenthal box. Everything else I've seen was practically gibberish.
found this too from the EPA website, also very easy diy air cleaner. even easier.
Image and instructions to build an air purifier made of
a 20 x 20 box fan with a single 20 x 20 filter attached to the back taking care that the air flow direction on the filter is pointing towards the fan.
attach with tape, bungee cords, or c shaped clamps.
change filter as needed.
Kate Nyhan is changing servers@JoBlakely Shiven Taneja, one of the creators of that info sheet, is our amazing intern at Community Access to Ventilation Information
https://cavico2.blogspot.com/2023/03/introducing-shiven-taneja.html
https://cavico2.blogspot.com/2023/03/introducing-shiven-taneja.html
Mr. Funk E. Dude 🍑💨@monkeyborg that's what I was talking about yesterday.