Draw air in from another room, if possible draw from all adjacent rooms. You could end up with a large volume of conditioned air to pull from. remember, you would like to exhaust just a little more than you draw in. negative pressure in the room. What are the dimensions of the room? What size is the window unit? Is the room sealed? What size lamps? Hydro? Chiller? If you can keep the room 72 and the res out of the lights, then you might not need a chiller. 70-65 for the res.