The Corsi-Rosenthal Foundation

How to build your own Corsi-Rosenthal Box

The Official Guide

Powerful. Inexpensive. Easy to build.

A Corsi-Rosenthal Box is a powerful air purifier that you can easily build yourself using locally sourced components for a fraction of the price of a commercially manufactured air purifier.

Download Instructions

How many Corsi-Rosenthal Boxes do I need?

School settings

Residential settings

4 Ways to Incorporate Your Corsi-Rosenthal Box into Your Classroom Culture

Big Build Tips

Cover of the Big Build Guide

Lesson plans

The University of Connecticut’s Indoor Air Quality Initiative has produced high-quality lesson plans for all grade bands: 
 
K-2
3-5
6-8
9-12
 
These lesson plans include a teacher guide, ready-to-use slides, and student worksheets. The lessons cover topics including indoor air pollutants, how to build a CR box, and how to measure/assess your indoor air quality. With their permission, we encourage you to access these lesson plans and immerse your students in a true STEAM learning experience. 
Access Lesson Plans
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