Box Fan Hepa Filter Reddit

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.

Box fan hepa filter reddit.

My hepa filter companion cube box fan now cleans 4x the surface area. 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. Fan 20 x 20 box fan any model and manufacturer filters depends on your needs and research findings. Further testing needs to be done with higher merv ratings and over longer periods of time.

Also i use a cheaper filter on the outside of that to make the more expensive filter last longer. 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. So it must be working. No pedants here yet so i ll say it.

To make one start by buying a merv 13 or fpr 10 furnace filter and tape it to the back of a box fan. Start off by unpacking the fan and making sure that it works. 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. The suction from the fan should also make the filter stick to.

The fan does sound like it s a bit under strain. 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. I need to replace both filters now because it s amazing how dirty and gross they are. Building the box fan air purifier.

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. Right now i have a small box fan that i have taped a furnace filter to the back. Hepa air purifier aeramax 300 set at 2 feet from particle counter. By the time you buy the correct fan and get the sealing figured out you might as well have spent the 300.

These can be hard to find quickly with the conditions however. Yes hepa will provide more filtration but if cost is an issue than the diy merv 13 box fan is a sensible choice. The filters sell for about 15.