I saw a guy on here about 2 or 3 months ago who had a bitchin' home made dust collection system. anyone got some decent designs saved
how powerful is a home made one and how can I make a super powerful one for under $300
depends on your goal. going to be tough to be under budget if you want to filter out all the fine dust that fucks your lungs. if you just want chip collection that means you don't have to sweep as much, easy.
So basically the filter is the expensive component. You're wanting to capture shit that's less than 10 microns at least down to around 2 or 3 microns...it's safest to just say screw it and go straight to HEPA at this point.
Everything else is just making something to put the filter in to force air through and the hoses to hook it up. You can be as fancy or as ghetto as you want so long as you've got a good seals. Let's call this around $50.
The deal with filters is you need one that captures small enough crap, but doesn't put too much restriction on the system (else you'll burn out your vacuum), so look and see how many cfm your vacuum is rated for, then find filters that match or exceed (a little extra restriction isn't bad, but you still want to avoid it) that level of cfm and build something around that.
Another alternative is to buy those rectangular/square hepa filters, then tape that to a box fan that you leave on (I'd try to shoot for the 1" deep ones with as many pletes as you can find because they'll take longer to get full).
I got an old attic fan, built four sided box with holes cut in each side for A/C filters, and put the fan on top. When I want to dust, I put my mask on, turn the fan on, and blow the room with an electric leaf blower.
That will get rid of some of it, but the fine dust doesn't have enough momentum to be blown. it need a strong air current to move it, and attic fan probably isn't strong enough.
Be aware, the more ghetto you are with the hoses, the bigger (more expensive) motor you will need to get enough suction. (also remember suction tops out at 1 atmosphere of pressure because physics)
Same thing with filters. every filter you add reduces air flow. You can counter this by having bigger filters (a filter that lets 1/2 the air flow per square inch but is twice as big works. This is why you see those box fan filter box things.
I am not OP but looking to build a dust collection system too.
I have a few old shopvacs laying around, but I also have a full size house furnace blower fan. I also have a smaller squirrel cage fan too, if the furnace one is too big.
Are these blowers not a good idea to use in a system?