If you emptied out the a/c then you could line it with HEPA and carbon filters. That would eliminate any odor. Not sure though it one would fit. Anything that clocks the view of the window will work. As long as you filter the air before you ehaust it you'dd be fine. You could even get and old compressor box and line that with filter and dticck it in front of the window.
Dont know what you set up is there but, I have some lattice laying up next to the house in front of my basement window. You cant hear that blowing noise or feel it. Just looks like some lattice laying up next to the house.