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Hello - When using a 5'LX2'WX8'T grow room that has optional 100 or 200 cfm ceiling exhaust fans, what size intake hole(s) should there be at the bottom for fresh-air ventilation be? Lower temp. CFL's used. Thanks a bunch for any input.

Hello - Would Co2 be practical and benefit a set-up such as a - DWC with three (3) 300w 9U Feltz 2700K/6500K dual spectrum CFL's, in a 2'WX5'LX8'T, 8 - 16 plant, ventilated closet room? Is the room to small for Co2? I don't mind the effort but don't want to completely waste money & time...