Just built a 5x7x8 room in one of my extra bedrooms. Have a 1000w hps cool tube 6in, 6in charcoal filter and a 440 cfm fan hooked to it. Have a 440cfm intake as well. Using cloth pots and a coco medium called tupur. Planted 3 double dream clones and 3 dream queen on Monday. So far they have anywhere from 1-3 inches of growth so I think all is well so far