safe Boxes

What Are DIY Corsi-Rosenthal Boxes?

Corsi-Rosenthal Boxes are Do-It-Yourself box fan air filters which consist of a box fan, MERV 13 air filters, duct tape, and cardboard. They are simple to construct and our experience shows that children love to help put them together.

What are SAFE Boxes?

SAFE Boxes build on the clean air benefits provided by a CR Box with one key difference – they don’t take up nearly as much space! See the video below to learn more, and click here if you would like written instructions.

Interested in a safe box?

If you’re in the San Francisco Area, please submit our Intake Form…

SAFER AIR INTAKE FORM