All you need to do is buy what s called a merv 13 or fpr 10 furnace filter and tape it to the back of a box fan.
Diy box fan hepa filter.
The idea is to add a reliable hepa filter in front of a flat surfaced fan with decent wind speed.
20 inch box fan.
If you decide that you want a hepa grade merv 13 and above the cost per filter ranges between 12 00 per filter and up depending on where you buy them and the quantity.
H11 bought from smart air.
20 by 20 by 1 merv 13 furnace filter.
There will be a little arrow on the filter showing which way the air should flow.
Build an affordable air purifier with a box fan and hepa filter california is still reeling from devastating wildfires that have tragically claimed many lives and thousands of homes.
The air filter s cleaning capacity varies with the size of the fan and the type of the filter used.
See results complete results in the chart below.
The diy box fan filter was able to drop pm2 5 particulates down 77 the hepa filter dropped the pm10 down 94 46.
The tests were done using a shinee fan model.
High efficiency particulate air filters hepa are what doctors suggest for optimal results but they can get pricey.
This filter will filter pollen dust mites mold spores bacteria proplet nuclei droplets from sneezing and smoke.
1 20 box fan 1 20 x 20 merv 11 to merv 13 electrostatic air filter tape or bungee cord to hold the filter in place.
As the fires continue to burn the smoke has collected throughout the san joaquin basin slowly feeding its way out over the san francisco bay area.
Your total cost for a diy box fan filter can be as low as 40 50 00 including incidentals like duct tape or higher depending on the filter options.
After testing i was impressed by how well the diy box fan was able to remove particulates from the air.
The filters sell for about 15.
Diy box fan filter with merv 13 filter.
Kyt25 15 with hepa filter hepa class.