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How good is to tape a hepa filter to a box fan? I think I recall a marketplace episode where a scientific or whatever said that it was better than some shitty p

How good is to tape a hepa filter to a box fan? I think I recall a marketplace episode where a scientific or whatever said that it was better than some shitty products and good enough for the small price.

thaumasiotes 3y ago
https://smartairfilters.com/en/product/diy-1-1-air-purifier/ https://smartairfilters.com/en/product/diy-1-1-air-purifier/
londons_explore 3y ago
For PM10/PM2.5, it's very good. Most filters and box fans are oversize for even a large house - you can typically get away with a CPU fan and much smaller filter and still have it clear the air to pretty much zzero PM2.5 in a few hours. Probably minimal impact on other pollutants (VOC's, NOX, CO, etc)... Many professional air purifiers don't make any claims about those either tho.
ska 3y ago
For home use it should work fine, after all it's functionally basically what most of the systems, especially the cheaper ones, are. Especially if you add a pre-filter of some sort. The main downsides are comparatively ugly and noisy.
deleted 3y ago
[deleted]
KennyBlanken 3y ago
Box fans have very low static pressure so airflow drops, very rapidly, as the filter starts to accumulate dust and its resistance to airflow goes up. This is mitigated by using four filters - constructing a frame that holds them top and sides - and the box fan goes on the bottom, with legs to hold it off the floor. Box fans are also very noisy. The box-fan design was intended mostly for people in wildfire areas who needed something to mitigate smoke inside their homes.
Bloating 3y ago
I made these for 1) for a post construction clean-up project - lost of dust getting kicked around. Worked like a charm 2) wildfire smoke - Happened to have the material from 1, & it did seem to help The trick is that the box fan turns over the air much faster than a conventional hepa. https://aghealth.ucdavis.edu/news/corsi-rosenthal-box-diy-box-fan-air-filter-covid-19-and-wildfire-smoke https://aghealth.ucdavis.edu/news/corsi-rosenthal-box-diy-bo... Still, $10 for the ikea filter seems like a good deal if you get good life out of it. 20x20x2 at filterbuy is about $16.5 x4.
AlexErrant 3y ago
Let me introduce you to a YouTube channel all about DIY air filters https://www.youtube.com/watch?v=XAJ__E-hIJc https://www.youtube.com/watch?v=XAJ__E-hIJc

thaumasiotes 3y ago

https://smartairfilters.com/en/product/diy-1-1-air-purifier/ https://smartairfilters.com/en/product/diy-1-1-air-purifier/

londons_explore 3y ago

For PM10/PM2.5, it's very good. Most filters and box fans are oversize for even a large house - you can typically get away with a CPU fan and much smaller filter and still have it clear the air to pretty much zzero PM2.5 in a few hours. Probably minimal impact on other pollutants (VOC's, NOX, CO, etc)... Many professional air purifiers don't make any claims about those either tho.

ska 3y ago

For home use it should work fine, after all it's functionally basically what most of the systems, especially the cheaper ones, are. Especially if you add a pre-filter of some sort. The main downsides are comparatively ugly and noisy.

deleted 3y ago

[deleted]

KennyBlanken 3y ago

Box fans have very low static pressure so airflow drops, very rapidly, as the filter starts to accumulate dust and its resistance to airflow goes up. This is mitigated by using four filters - constructing a frame that holds them top and sides - and the box fan goes on the bottom, with legs to hold it off the floor. Box fans are also very noisy. The box-fan design was intended mostly for people in wildfire areas who needed something to mitigate smoke inside their homes.

Bloating 3y ago

I made these for 1) for a post construction clean-up project - lost of dust getting kicked around. Worked like a charm 2) wildfire smoke - Happened to have the material from 1, & it did seem to help The trick is that the box fan turns over the air much faster than a conventional hepa. https://aghealth.ucdavis.edu/news/corsi-rosenthal-box-diy-box-fan-air-filter-covid-19-and-wildfire-smoke https://aghealth.ucdavis.edu/news/corsi-rosenthal-box-diy-bo... Still, $10 for the ikea filter seems like a good deal if you get good life out of it. 20x20x2 at filterbuy is about $16.5 x4.

AlexErrant 3y ago

Let me introduce you to a YouTube channel all about DIY air filters https://www.youtube.com/watch?v=XAJ__E-hIJc https://www.youtube.com/watch?v=XAJ__E-hIJc