is it possible

to cool a room with like 10 600watt hps with a portable a/c unit without ventilation in a sealed room? jus wondering

No there woulnd be any new air soo all the co2 will be strped from the air then the portable ac will just make that warm old air to old cold air ...

couple of fans along with the a/c should do the trick.

EVERY AC UNIT IVE SEEN NEEDS TO BREATHE oops