We have Central Air but not in my Grow Room.
The exhaust Fan is just blowing into the room.
I told my Son we should just vent it outside. He said just run A/C into my room.
???
I grow in an insulated, unconditioned (in the summer) shop. I vent into the attic, which helps control humidity, but also heat - not only from my lights, but the positive pressure in the attic aids its passive ventilation.
If I had an A/C, I would still vent to the attic.
If you're having heat or humidity issues, I'd start with venting outside. If that doesn't do enough, A/C might help. But as
@medidedicated pointed out, that might put more load on your A/C than it's designed for.
