I’ve been having a look at different methods... Might try no boil on oneMy current extractor above the cooker is not even connected to a vent. Complete waste of time.
Interestingly the OP could just not do a rolling boil. Mash could be done on a low heat in say a slow cooker. The boil is mainly done to sterilise the water. As long as the complex starch in the grain has been broken down fermentation should be fine. Hops might be problematic in a slow cooker. It'd be way too bitter. Just me being stupid
Ours has an external vent on the side of the house, massive big fan assembly thing up inside the hood, huge hood.... It actually worked ok when I had my ACE under there, as the top of the ACE was closer to it, and narrower. But when I used my DIY rig it had a larger surface area (so more boil off...) and was lower down, so further away from the hood. It just didn't have the "suck" to pull all of the steam up. Plus, as I mentioned, there was the condensation that used to form on the stupid mesh, I used to have to mop it regularly to stop it from dripping....Do you think it might have anything to do with it being connected to an external vent