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bigtopsfinn Reviewed by bigtopsfinn on . co2 setup - how ? if I put in a co2 system- room will be 640 cubic feet- what is best way to bring intake air in for cooling lights?if outside air tempt is extreme oneway or another- also are there any books with good details on setting up a growroom and using co2-old outdoor grower going inside and hi-tech- all good advice appreciated Rating: 5