How much fine dust do you get on the floor and walls of the closet?

I'm asking because in my current shop I have a cartridge dust collector and air compressors in the same closet and I get a lot of fine dust caked on everything inside the closet. In my next shop, I will be buying a cyclone and I need to know whether or not I can put the compressors and cyclone in the same closet or build two separate closets. The closet will also have shelving with all my hardware, parts, and supplies that I would prefer not to have covered with fine dust. I'm leaning towards putting the cyclone in a separate isolated closet but if the cyclones really do as good a job of filtering the fine dust as they say, I'm wondering if it will be okay to just set it up in the main closet.

Thoughts?