Hi !! I'm new here, sorry in advance if this is a repost. The area I choose to be my grow room has no windows and no air trap....unfortunately, cutting holes in the walls is not an option at the moment. So my first question is: Is it possible overcome this issue with a lot of ventilation and additional co2 from a tank ? My second question is: Let's say I use the same room, but I install a grow tent. I'll be able to hook up an air intake and exhaust coming in and out from the tent, but my concern is the following...the air in the tent is technically the same air as in the room. I need help to figure this out !! Experienced growers what are your thoughts and suggestions ?