09/11/2026
Clean air is community care. 🌬️🌱🫶🏽
A Corsi-Rosenthal Box, also known as a CR-Box, is a powerful DIY air purifier that can be built using locally sourced materials for a fraction of the cost of a commercially manufactured air purifier.
When air purifiers are difficult to access because of cost or limited store availability, a CR-Box can be a great alternative. Using four filters, a box fan, cardboard, and tape, it can help reduce wildfire smoke, dust, and other airborne particles indoors.
Swipe through for the step-by-step process, save this post for later, and share it with someone who could use it! You can also visit the link in our bio for an additional guide to building your own CR-Box.
Small acts of Iyingidi, responsibility and safety, help us care for one another and the spaces where we gather. 💚