Heat? My grow room
 

Ron- Heat? My grow room is in the attic with little ventalation, but I have a CO2 tank. In the summer it gets way above the optimal temperature (90-100+) and I was wondering if I could place an A/C window unit in the room.....on the floor (not in a window). Have you heard of this before? Any ideas? thanx lots.

Yes that is to hot. Yes you can place the AC in front of the open window instead of out the window but don't forget that an AC drips water so sit it in a container to trap the water. A hot water heater pan works good and you can run a drip line from it. A child's swimming pool also works and gives you plenty of time to empty the water.
Ron