Ok cool so you are pretty much there -
I missed the part where you said the brand and only saw 8" 
Get that room scrubbin my bro! But it is strange you find that smell near the AC units… More scrubbers! Sounds like the AC pulls/whatever the hell it does more air than the scrubber does. So either more scrubbers each corner or a bigger massive giant scrubber in the center of the AC units.
Also that is an impressive breadth of canopy ur working with. Would love 2 see a pic or two!! What strains are you running?