I am definitely venting the room. I have the option to recirclate fresh air directly from outside or from the lung room which would also be pulling some fresh air through as well. I bought an 80 pint dehumidifier tonight for a pretty penny that has a pump drain on it and I can run this hose outside and not have to worry about dumping the water. I also grabbed some R8 6 inch reflectective insulated duct which I switched too from aluminum a couple years ago which I would never use that flimsy ass aluminum ever again. This stuff does not leak, No pin holes, No light comes through, no odor seeps in, and it also reduces heat by fat compared to regular duct that most tend to use. Grabbed some 10/2 and 12/2 romex wire for the inside wiring of the grow. Some heavy-duty tarps to put down over the plastic on the floor and gonna find some thin Styrofoam to place on top of all that as well. I' gonna have to figure out a good method of venting the room before the weekend It is the only thing kinda holding my mind in the dumps as of right now. Everything else is golden. I will be running my lights on 240 and all the rest on 120. I guess since I have separate rooms the dehumidifier should be placed in the walkway "lung" of the room, right?