Would you think it would be possible to seal the front of the A/C with your 2x4 setup boxed off, Tent on a closed ventilation circuit with the A/C just as you have, but have the A/C in an actual window. In other words, putting the A/C into the window, boxing off the front for the tents circulation.
Would that type of a setup work just as well, and without the additional exhaust fan?
yeah if I am understanding that correctly, it sounds like it should work.
If you have your window ac exhausting outside of your ambient air room then you won't need an additional exhaust fan (white canfan I have in my pictures) to push the air. That fan is only to help the ac's motor push the air when having to exhaust through a duct. no duct, no need for exhaust fan.
im confused. you said you have closed circuit vent on your lights but also say 'the carbon filter working with negative pressure'.
do you have it carbon filter > light > fan > window? or window > light > fan > window?
The latter would imply that your carbon filter is a 'scrubber' and just recircs the stink inside the tent while the lights are on their own closed circuit vent line without any carbon. There should be no pressure, positive or negative in the tent at all.
so back to your first idea 'cutting a hole in the tent and having the A/C within the tent. I was thinking of doing something similar where the A/C is still in the window, but butting the tent up to that window so the A/C vents and such would be within the tent'
this is exactly what you should do.
makes sense. nice setup. I think changing the setup to what we're discussing will be far more efficient than your current setup.
a scrubber should be plenty efficient and no smell should leak except when you open the tent because there should be no +/- pressure. go overkill on your scrubber, I use 24" x 6" scrubbers in my 4x4' tents and replace them often.
and yes since it's sealed, it's perfect for co2. rooms with elevated levels of co2 can be flowered at higher temps too, I keep my co2 supplemented tent from 78-82 deg.
yeah if I am understanding that correctly, it sounds like it should work.