Box Fan Hepa Filter Reddit

No pedants here yet so i ll say it.

Box fan hepa filter reddit.

The fan is also very loud i don t know if quieter box fans exist or if i should attempt to modify this to work with a circular vornado type fan i have one on hand that is much much quieter and seems to push more air. But a quick solution as posted by the university of michigan s medical center is to create your own filter using a box fan and a standard hepa filter both readily available in most hardware stores and costing about 25 for everything. Merv 13 box fan set up at 2 feet from particle counter. This article is based on the 3m merv 12 20 x 20 pleated filter and the web absorber cut to fit 20 x 25 filter.

Hepa air purifier aeramax 300 set at 2 feet from particle counter. To make one start by buying a merv 13 or fpr 10 furnace filter and tape it to the back of a box fan. Right now i have a small box fan that i have taped a furnace filter to the back. Yes hepa will provide more filtration but if cost is an issue than the diy merv 13 box fan is a sensible choice.

Further testing needs to be done with higher merv ratings and over longer periods of time. The box fan is gonna be pretty shitty at generating the pressure delta you need to pull air through the filter theres just way too much slippage around the vanes. I taped a 20 by 20 inch honeywell fpr 9 filter to a lasko 20 inch box fan and ran that combo through our standard 35 minute five match test in our 200 square foot new york test space with the. I need to replace both filters now because it s amazing how dirty and gross they are.

So it must be working. Start off by unpacking the fan and making sure that it works. Fan 20 x 20 box fan any model and manufacturer filters depends on your needs and research findings. Also i use a cheaper filter on the outside of that to make the more expensive filter last longer.

The suction from the fan should also make the filter stick to. My top two tips are to put the filter on the intake side and then you don t need to secure it to the fan. By the time you buy the correct fan and get the sealing figured out you might as well have spent the 300. Building the box fan air purifier.

The fan does sound like it s a bit under strain. These can be hard to find quickly with the conditions however. You re cleaning the same amount of air per minute the fan still pulls the same volume of air through it but the filters should last 4x as long.