DIY Air Filtration
DIY Air Filtration Workshop
Learn to build your own affordable, effective air purifier. We'll explore several designs, including the well-known Corsi-Rosenthal-Comparetto box - a collaborative open-source design that costs less than $200 and requires no specialized tools.
How It Works
The basic design uses four MERV-13 filters forming the sides of a box, with a box fan on top and cardboard as the base. Air flows in through the filter sides, removing particulates, and exits through the fan at the top. MERV-13 filters remove approximately 85% of viral-laden particulates.
What You'll Learn
- Understanding MERV ratings - How different filter ratings affect particle removal
- Sizing for your space - Calculating air changes per hour (ACH) for your room
- Building techniques - Assembling effective, durable filter boxes
- Design variations - Choosing from multiple configurations with varying filter quantities and airflow
Performance
These devices deliver approximately 600 cubic feet per minute (CFM) of filtered air. For a typical 20'×20'×10' room, one unit adds about 3 air changes per hour; two units provide 6 ACH - matching Harvard School of Public Health's recommended minimum for COVID-19 mitigation.
Workshop Details
Perfect for anyone interested in improving indoor air quality at home, school, or workplace. No specialized tools or prior experience required.
Learn more: edgecollective.io/airbox
Register
Registration opens late January 2026.
Have questions? Contact us to learn more.