Good points, Bakatare - my thoughts were the same as yours. I've got a filter at the top sucking the hot air out of the tent, at the same time I've got an A/C unit blowing cold air in. Outside the tent it swings from 66 (overnight) to 74 (when I'm here all day). It might not sound like it, but putting your hand inside the tent at the intake vent, the air is REALLY COLD at only 70 degrees. And it's moving at a pretty fast clip. So, you've got this nice cold air pushing the hot stale air upwards and being sucked out the tent. The pots are elevated on bricks to allow for air circulation all along the bottom of the tent.
I've been watching it closely and it's been 84 since yesterday now that I've set a hold at 70 on the A/C. It really doesn't feel hot at all inside.