Ok gals and guys I joined this site wanting to learn how to gurilla grow, which I still am, but now now I’m planning a grow room after reading these forums. I have a 5x9 room thst is in the back of an old house. I plan on running 3 King 1500 LED lights on my plants and will do my seeds in another small room. I am growing autos. My question is what kind of air system should I install? The room is on an outside wall so u can cut out for vents, duct, fans etc. I have no idea what would be a good system to bring good air in and bad air out. Does anyone know what I could use?