garden knowm is right. smell can be a huge problem, depending on the strain. i usually keep my rooms sealed, no ventilation. in that case i use a large carbon scrubber to recirculate the air in the room. inline ozone generators are decent, i'm just not a big fan of them. if you set your room up properly with three thousand watts, hydro, co2, and moderate your temp. you'll easily get 2.5lbs per light. three thousand wattts is much easier to control than four thousand watts. you can figure about ten degrees extra heat above ambient temperature for each thousand watts of light.
redneck1 Reviewed by redneck1 on . BIG GROW -how practical is this? The upstairs room has a vaulted ceiling and is a pretty big room. I would probably have two rows of air cooled lights that exhuast out that window. My main concerns are noise generated by the lights and fans, which neighbors might hear. My question is will I be able to remove enough heat to keep the grow room cool? And if I use appropriate materials, can i eliminate the chance of neighbors hearing fans? I feel that a townhome grow could be safer than a house grow because the Rating: 5