The organization I work for is in the process of retrofitting a warehouse space into community art studios including a clay studio. The HVAC contractor who designed the air exchange system for our new facility thankfully had some personal and professional experience in clay studios, and designed a system using the mitigation of silica dust exposure as the highest priority. Clean incoming air will be delivered from the ceiling and move down toward the floor in a curtain (no swirling or circulating). Exiting air will be pulled from floor level, so any dust that is produced will be whisked away without traveling past the mouths and noses of studio participants. We will of course be using frequent mopping as our first line of defense.
The process has got me thinking about how to improve the air quality in my home studio. Right now I have very little air movement. This is better than lots of circulating air, but still not great. It can be pretty stale/musty in my studio (located in my unfinished basement). I have a three-pane ground-level window in my studio. My plan is to remove one of the panes and attach two blowers (like the blowers used in electric kiln vents) into the window frame (one blowing in, one blowing out) and run dryer tubing off the blowers. I'll position the incoming air tube on the ceiling, pointed down, and the outgoing air tube at floor level. It won't be the prettiest system, but I'll be the only one who has to look at it.
WoogiesPlace, perhaps some version of this floor-level exhaust will be helpful for your studio build.