Now I use homemade cold water heat exchanger, no heat to exhaust, no windows, hardly any electric, uses tons of cold tap water though(no chiller/reciculating tank/coil, chiller too much $ in electric, water bill is cheaper)
For years I would build custom sealed 'envelope' around window ac rear heat section and exhaust heat out the back through ducting up n out the roof, and run the unit inside no windows. This was my way, before water ac, and only because, of the smell leaks through back of window ac to the outside.
Sorry so much window ac talk is getting outta hand taking up too much thread space. I'm done.
lol
..but I still don't understand without any exhaust to outside, how will he use portable ac unit at all?
and what about tent grow space heat exhaust? just gonna reciculate inside the apt like a sauna?