I'm doing the electrical layout for my shop build out, and I'm considering adding electrical outlets in the ceiling for air filtration units. I've seen the Jet and Rinkon units on sale on Black Friday the last couple years, so I might pick one or 2 up this year. Do these units make a noticeable difference in the shop air quality? Are they a pain to maintain? I was thinking of getting 2 and positioning them centered on the long walls, mounted at ceiling height. I have an Onieda cyclone dust collector to pick up the heavy dust and chips at the machines, the air cleaners would just be for the air borne dust. Is it a worthwhile investment?