It has been a YEAR. Trash Panda hopes you've been staying sane and safe. Well, as much as you can be in the year of our Everlasting Dumpster Fire 2020 ( Update July 2021: And the year of our Great Anxiety 2021). Speaking of fires - today's post is about how to make a cheap & effective DIY air purifier. Depending on the rating of the filter you use, it’s good for wildfire smoke, allergens, or even viruses. Parts needed: + 20"x20" box fan + Furnace air filter, preferably 20"x20" and with a rating of MERV 13 or higher (more on this later) + Tape or bungee cord Tape or use a bungee cord to attach the filter on the back/air intake of the box fan and make sure to have the little arrow on the side of the filter facing towards the fan. That's it. Just use enough tape to keep the filter on there, and try not to cover too much of the filter area with tape. You can screw on little metal brackets on the side of the fan to create a more ...