Yea but its whole house central ac. Not specific for the closet but it still works. What ive been doing to dial it in is taping off part of the vent and it restricts the air flow through the duct going into the closet so i can raise it or lower it that way.Do you have a thermostat? You can buy one that turns on a vent ant turns it off when it gets below 77 and turn it on at 80 idk about the air conditioner tho I just suck the air out my tent u can always add buckets of water wide and thin like aluminum baking pans etc so it evaporates.
I can add more tape to lower the temp in the closet or take some away to raise it. Works good so far! I will clean up the tape and make it more permanent once i find the sweet spot.