4 ms·
That's a clever trick. Creating the air pressure with a box fan and then filtering using a MERV filter. I guess if you can find a 20x20 box fan and attach a 20x
by 29athrowaway 3y ago
That's a clever trick. Creating the air pressure with a box fan and then filtering using a MERV filter. I guess if you can find a 20x20 box fan and attach a 20x20x1 filter to it you can do this easily.
But how much the filters last depend on a variety of factors. If you have pets (with fur) your filters will last much less.
- bb88 3y agoWhat's interesting is that if you look on amazon, MERV 13 filters + Bungee Cords + 20" box fans are commonly ordered together. Further you can do a 20x20x4" MERV 13 to increase the lifespan of the filters. It also beats the price of buying specialized HEPA filters for a particular brand of air filter.
- lamontcg 3y agoMake a cube out of 4 MERV 13 filters and a box fan on top and the cardboard the box fan came in on the bottom and secure it with duct tape. That'll help reduce the load on the box fan and push more air through more filters.
- bredren 3y agoIt is called a Cosri-Rosenthal box [1]. I've built three variations on these using different kinds and sizes of Filtrete filters they are very cheap and effective. The downsides are that they take up a lot of space, are a big eye sore and awkward to carry and move. They also can make a lot of (white) noise on high, which can mask sounds you want to hear. They're great for special situations like wildfires or out of the way areas like basements where looks don't matter. For common living spaces we use Coway Airmega AP1512's which are relatively compact, auto cycle up and down fan speed and are much more attractive than DIY stuff. [1] https://en.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box https://en.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box
- 29athrowaway 3y agoAnd replacing the filter is problematic.