Computing a mental simulation, I was arriving at the conclusion that a slower filter air flow would lead to a higher vapour concentration which would make filtration easier. I've just read a comment on this reddit post.

Therefore, it may make more sense to make the Suspense airtight (perhaps with a very slight negative pressure) and then fully clean the air as a final step before the user is notified to open the door. Lower evaporation means that the filters should last longer.