I havent put a filter on both ends , but im sure it could work. I would listen for any changes to fan would undergo ( whining or obvious motor stress ) You dont want to over work your fans. I WOULD put a less number of pads at exhaust end to help reduce restrictions. Experiment.
I use 3 on the inlet side because of stinkier strains ( cheeses ) but usually can run 2 normally with good results. An odor neutrilizer ( ozium ) or odor can placed in room or outside tent helps " scrub " room air.
