No, in my 2x4 I have an excellent ventilation system in place. In any tent set up you should have ventilation in place for air exchange. I don't have them in there anymore, I got a nicer unit in there now. I was planning on selling them but am now rethinking how I can use them. As of now I have 5 lights in the garage just collecting dust..lol. The two Mars Hydro 1000s, a pair of Mars Hydro TSW 2000s, and a Growers Choice ROI E680S. My 2x4 currently has the Atrium Hydra 3200, it's a beast of a light. The 2x4 is just to hold me over till the winter, that's when I use the 4x8 (tent) in the garage. I don't know exactly how your grow environment is at the moment. Looks like you just found a corner somewhere at your home. But air exchange is important. Just as important as the light they receive. Get the air moving in your grow area.