Which Side of the DIY Should the Filter Be Attached To?

The filter should be attached to the front of the fan. Do take note that the filter also has a front and back side. “This side faces the fan” is printed on the frame of HEPA, and you can attach the filter in the direction indicated.

Get Your Free Guide to Breathing Safe

Join the thousand keeping up on the latest research & knowledge on how to breathe safe. Sign up now and receive a free guide to breathing safe!

Was this article useful?00

Smart Air is a social enterprise that creates simple, no-nonsense air purifier and provides free education to protect people’s health from the effects of air pollution. We are proud to be the only certified B-Corp dedicated to fighting air pollution.