Homemade air purifier. 2 filters and a box fan : r/mildlyinteresting
The Cuboid: A DIY air purifier that's better than a box-fan
DIY Air Filter Box Fan : r/woodworking
Smoke is here: remember to check your filters for your home. : r/vancouver
LPT: Tape a 20x20" filter mesh to a window fan for a cheap DIY air filter that costs ~$20 : r/LifeProTips
My janky swamp cooler for 100°+ days (box fan) : r/redneckengineering
LPT: Box fan + 20 inch filter = cheap and effective indoor pollen filter. : r/Austin
Preparing for poor air quality - DIY air cleaning with Corsi-Rosenthal Boxes : r/preppers
Cheap air purifier : r/Frugal
I wanted an air purifier for my allergies, but someone suggested spending $25 on a box fan and filter instead. Fingers crossed that it works! (Feat. concerned kitty) : r/Frugal
Air filter on box fan day 2. Wild fire smoke : r/interestingasfuck
DIY air purifiers a hot trend against wildfire smoke
My home made air filter fan. Looks like it's working... : r/Calgary
Spare fan and good filters : r/madisonwi
Do the DIY box fan filters work? Well, here's mine after just 1.5 days running in a closed bedroom (Greenwood area) : r/SeattleWA
A follow up to the DIY air purifier thread- here's my toddler's room's box fan filter after 6 weeks of nighttime use. Glad to know it's reducing his environmental allergy symptoms this
Air filtration : r/BeginnerWoodWorking
Box fan with 3M MERV 12 Filtrete filters on the front and back, duct taped. I have a small room, will this do the trick as a Corsi-Rosenthal box? Not sure why
Homemade HEPA filter for tiny, dusty apartment. This is the result of 18” furnace HEPA filter + Box fan on about 10 hours per day for 1 month. Total price <$40; 6
How a MERV 13 Air Filter and a Box Fan Can Help Fight Covid-19 - Tex-Air Filters
Furnace Filter, 4 months old and New : r/kelowna
Box fan air purifier filter after 1 week of use during Campfire : r/sanfrancisco
20x20x1 + Box Fan : r/Portland
Air quality report : r/Louisville
