4 ms·
One thing that people never talk about the box fan air purifier design is how it pushes air through the filter, rather than pulling it. If you look at any comme
by gregschlom 6y ago
One thing that people never talk about the box fan air purifier design is how it pushes air through the filter, rather than pulling it. If you look at any commercial air purifier, you'll see that they pull the air through.
Pushing the air through the filter has the major downside that some of that air will bounce back out, and may help disperse the dust and bad particles that have been accumulating on the back side of the filter.
- jdhawk 6y agoput the filter on the other side of the fan?
- chrismeller 6y agoMost designs I’ve seen have it pulling. Pressure attaches it, rather than tape.
- Tostino 6y agoYeah, you can just as easily make it a puller design. I made mine not long ago, simply taped a MERV13 4" filter to the back of a 20x20 box fan. Works like a charm, no dust getting pushed off the filter.
- rachelbythebay 6y agoIQAir GC MultiGas models do both. There's the 'prefilter' on the bottom (inlet), a big fan in the middle, and a bunch of gas filter canisters on top.
- qw3rty01 6y agoThe internal components also don't get dusty if it's sucking instead of blowing air through the filter