3 ms·
Indeed, linked in that article is this which I built yesterday and works very very well. https://www.texairfilters.com/a-variation-on-the-box-fan-with-merv-13-
by binarymax 3y ago
Indeed, linked in that article is this which I built yesterday and works very very well.
https://www.texairfilters.com/a-variation-on-the-box-fan-with-merv-13-filter-air-cleaner/ https://www.texairfilters.com/a-variation-on-the-box-fan-wit...
-EDIT- I should also mention that you don't need 5 filters for this (MERV 13 is expensive), you can use 4 and a piece of cardboard for the 6th side that is touching the ground.
- lamontcg 3y agoYeah mine has 4 filters with a box fan on top and cardboard that the box fan came in as the base. All taped together with duct tape. Brain dead simple and cheap. Used some more duct tape to fill in the "corners" of the box fan. Mine blows positive pressure into the box, I just saw some designs that suck negative pressure out of the box, I don't know if that matters, but I've got a PM2.5 meter and mine worked fine last year during the smoke days in Seattle.
- YZF 3y agoI would think that you want to keep dust out of your fan motor/bearings etc. so you want the fan to be sucking out of the filter, not the other way around.
- culopatin 3y agoThose fans normally would operate without any filters on either side, so the dust won’t really matter.
- masukomi 3y ago... they'll still function, but if you've ever had one you'll know that dust does matter. They're a pain to clean and the various crap in your air builds up on every edge. Definitely want it sucking filtered if that's that's an option.
- Eisenstein 3y agoI think it matters because with negative pressure you are causing the box to close and cover the gaps, whereas when you blow you are pushing on the box causing the gaps to expand.