OGgrowsanswered grow question 5 years ago Very well, the level of ventilation I think is great, one fan catching the bottom and the other higher fan blowing wind from the top. I think that in the future when you have more plants in the grow and the cooltube that you should place the reflector horizontally in the middle of the grow, it will distribute the light better through the grow and it will be easier to handle the tubes of the cooltube. if you have the opportunity and have more ventilation pipe I advise you to mount the extractor outside. if you want i can send you some pictures as i have mine, i have 1.5x1.5 with cootube hps 600w. good luck 💪🙏🌱