I use to extract in the down stairs kitchen. Now it is full of treasures that come and go. So now I have to extract in the upstairs kitchen. I am glad my extractor only weighs about 20 pounds.
Sterile Jim? New house ... full of formaldehyde out gassing for the first couple of years, maybe some fiber glass insulation dust. Pitch a tent in the back yard after a rain storm is about as sterile as you can get.