DIY: Make Your Own HEPA Air Filtration System for Just $30!
DIY Air Purifier for about $30 Bucks!
I was skeptical, but after watching the video from University of Michigan Health System’s Sinus Center, I was convinced!
I went out and bought 2 filters. They were not the Merv 13 but they were close 80 ~ 85% with Microban. I have had them running for about an hour and my sinuses feel soo much better!