cheers my grow room is my kitchen cupboard. 2ft x 2ft x 8 ft. 250w hps a 6 inch fan. the cupboard has 2 vents in the wall to the outside 1 at the top 1 at the bottom. ive stuck a 6 inch computer fan 2 the top vent extracting air straight outside. there is 3 plants in 10 inch pots nl x shiva. 5ft+ height not bad for m,y 1st attempt eh? growing in all mix with added guanno