I don't fully understand the question either, but you always want to go with an exhaust capability 'at least' as large as the intake ... :smokin:
the image reaper Reviewed by the image reaper on . cool tube? I'm going to buy a new system, which as got a big cool tube with 2 600watt HPS bulb's init, would it be best to have my extractor fan and ducktin 2" bigger, as this will be the only extraction point in the grow room? Thank's. hydroing. Rating: 5