If your ordering the 20x36x64 tent from HTG, then know that the diagram they show is wrong.

I got two 4" ports (ones in back) and the two top and side's were 6in ports. Talked to them and they said that is the diagram the manufacture gives them, and they are not allowed to change it at all.

Picked up a 6500 BTU a/c unit today. Room is a lot cooler now. Tempts in tent are about 78. WAYY better than 95.