Cause I have 2 portable ac instead of buying two carbon filter,can I just have one carbon filter with both ac blowing in to my attic and just have one carbon filter with a inline fan suck in the air and blow it out will that work as well?
You can attach a carbon filter to your AC (CFM double the CFM on the AC) and blow into the attic.
You can blow the AC into the attic and have a fan+carbon filter there to scrub the air.
You can vent the AC into the attic or a tent or whatever you have and have outline fan plus carbon filter with a CFM bigger then the AC and by that creating negative pressure so you get rid of any smell and hot air.
Correct me if I'm wrong but I think these are the ways to get rid of smell leaks using portable AC's. I myself would blow in to a tent/attic and have a carbon filter and outline fan set up there and then blow the air outside.