I am planning to build a cheap and simple HEPA air filtration system for my office. Anything you can recommend or have build one in the past, anons?
>>2800839This has already been covered many times: box fan blowing up, on a square frame made out of four filters.>>2800855Too much flow resistance.
>>2800839Not hepa, but Air King makes a box fan with a bracket to hold a 20x20 furnace filter. It's decent, and you can use however fine of a filter you want in it. I have three of them in my house because of my dogs. My only complaint is that the filter is very close to the back of the fan--it should have been spaced away a couple of inches--and they could have put a shroud to make the fan blades more effective, but judging by the amount of filth the filter picks up, it is indeed effective. See picrel
>>2801233very convenient , this might be what I am looking for
>>2800855
>>2800923I need this. My room gets extremely dusty from cat hairs and all the talcum powder I spray on my bussy
>>2800839https://en.m.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_BoxFor the price of the filters themselves and a box fan you can get an air purifier that works better than $100 models. My wife has the worst allergies on earth and we both swear by these. Four filters taped down to a cardboard bottom and fan on top is all you need. Maybe put some cardboard supports on the corners for extra strength. Takes 10 minutes and will last you for about 3 months if you have it on all the time. We only replace them when the filters start looking real funky. Helps with smells, totally handles pollen , and if you use the high grade filters, it works for COVID too. The same design can also be scaled down to a desktop model using 12-in square filters and a cheap Black & Decker fan you can get off Amazon.
