No matter how many tents ypu connect, there will need to be an exhuast from tent to lung room. The thing ypu wpuld need to worry about kesping the temp and humdity locked in and staying constant. If you can find a way to keep temp and humidity lockdd then that is a recipe foe success. I currently havr a 5 x5 with and aC unit inside the tent. I have to have 2 exhausts, 1 pulling warm air from ac unit to the outside of the tent and another that is just an 8 inch opening at the top of the tent connect with some 8 inch ducting to make light tight.