<dust collection rant!>
Curious
: Why no dust collector needed on the MPCNC?
My workspace is a room IN the house. I have (in order of effectiveness) a surprisingly similar setup to @Tuco with added goodness 
:
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A P# respirator which I try to wear at all times when creating dust.
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A 2HP dust extractor with 6" ducting to each machine. (The extractor and it’s filter are outside in a small lean-to built to house them. After years of having it inside, it’s a pleasure not to have to deal with the extremely dangerous and not to say messy superfine dust that lingers for hours.)
-
A shop vac with direct connection to smaller machines, sander etc.
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Two 10" fans which extract air directly to the outside @abut 100cu ft/minute (leave them on for a couple of hours AFTER whatever dust creating operation).
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A Jet filter which is also left on for a minimum of two hours after leaving the room.
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A Damp cloth to wipe down all surfaces every so often because the above isn’t all that effective with the superfine (and dangerous) fine dust - the stuff you notice on horizontal surfaces the next morning.
There are many places on the web where you can get specific information (as usual be careful much of it is wrong) start here if you have nothing else to do for the next year or two: Dust Collection Research - Home
So what have I achieved? - I have a reasonably clean space, and don’t track too much dust into the house.
The fine dust from MDF is VERY difficult to control and with my imperfect setup, I am going to say impossible to eliminate entirely (see 5). Apart from the mess, like many people I am hypersensitive to wood dust (Yes, I need another hobby).
If tracking dust through the house is not a problem for you, just wear a respirator and you’ll be fine.
If you want a really great mask that actually works and is light and comfortable to wear - here’s what I use:
</dust collection rant!>