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I first saw one of these 19 years ago. These two shit bags attaching their names to this design are nothing more than clout chasers.
Indeed. My first thought was “oh, so that’s what they were called?” Only to see that two designers just slapped their names on an already existing creation decades after the fact
I made a comic about this:
Was it a 5-filter design? Like a big box? I’d personally love to add it to article if there’s documentation of them
We used it to clean cigarette smoke from the bar before we could afford huge ionizers. Nobody took pictures because it wasn’t anything special and was basically common sense.
But 2 decades later apparently you need to be an engineer to figure it out? This is what happens when you teach kids to pass a test but don’t bother to teach them how to think.
Eh, I’d argue with IAQ that I don’t want to go with mere common sense. I want to see it demonstrated to work. Which people have done now regarding covid aerosols and other particulates, which can be difficult to capture. These devices have been shown to work to catch them, while other DIY solutions don’t always. Similar to masks. N95s have a lot of engineering behind them. Sometimes things really are more complicated than they appear
Certainly truth to that. I have to explain different N95 masks weekly so I get your point.
We did this 20+ years ago and we were just trying to get rid of the haze of the bar and keep the walls and surfaces cleaner. IAQ wasn’t really a thing anybody talked about. Throwing some smoke rated air filters on the sides of an empty cardboard and pulling air through them seemed like an obvious and easy fix and it did make a significant improvement immediately. No peer-reviewed testing in the dive bar scenes so no real information to provide.
Yes it was a five filter design. It was a cool thing at a house I partied at occasionally. The most official documentation might be it pictured at one of those parties. They used it to clean smoky basement air.
University of Michigan Medicine published an instructional video on this in 2011[4] and there are many online discussions and DIY blog posts predating 2020[5]
Indeed.
Both those links are about 1-filter designs though. This is a five filter design which performs better than the sum of its parts. Couldn’t find any sources on that existing earlier, should be added to the article if so
Edit: found an imgur from 2018. https://imgur.com/gallery/hepa-filter-companion-cube-box-fan-jtECP9C
Found a triangle from 2012 https://marshallhansendesign.com/2012/01/02/studio-operations/
Unfortunately both those sources are not sufficient for Wikipedia
I have one of these for my woodworking shop. It takes up substantial space in my small shop, but massively improves the air quality.
at work I hang them fan blowing down under the top tier of the pallet racking which has about a half pallet width of extra space that would otherwise be wasted. The spaces below are low enough to be feasible to use as shelving but the top one made a great out of the way filter location. Another one is attached to the outside of the mezzanine railing blowing sideways away from the mez.
Is your workshop tall enough to hang one overhead or on a wall? The fan doesn’t have to blow upwards judging by how mine always have absolutely loaded filters on all sides when I replace them.
No, I unfortunately have low ceilings or else I would definitely have hung it.
I also have it blowing into the box and expelling through the filters. I could have gone the other way but since it’s floor standing, I can use it as a huge vacuum basically. I can keep it beside where I’m sanding something and it sucks up a huge amount of the dust.
Pushing into the box also avoids the high velocity airflow that kicks up dust (though you could argue that kicking up dust makes it available for the filter to catch later).
I built it based on this guy’s testing: https://youtu.be/FDroqRfWiWE
its a great way to make a quick filter on the cheap without paying the markup for the trangely dimensioned filters of commercial air filter machines. You can put more or less money on the actual filters depending on what you need to filter too. I have like 6 or 7 of these going between my workplace and home. some are set up with construction dust in mind, a couple to get the smoke from outside at work which gets in when doors are left open, and the rest for pet dust.
If only I knew where to buy filters in Germany. All I can find is replacement filters for all kinds of air purifiers. I can’t imagine that they aren’t marked up compared to “generic” filters.
You don’t use forced-air furnaces with furnace filters?
Same problem in Australia, but I’ve recently found out that IKEA sells large rectangular filters that look like they might work.
If anyone needs video confirmation, Rtings made a video comparing the box to commercial air purifiers.
