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Thank you kindly for your help! God Bless,

Thanks for the input. There are two 110 cfm ceiling exhaust fans, that's 220 cfm pulling air up & out of the room. Each bathroom type, exhaust fan has a 4" duct merging into a Y not a T for easy air flow into a scrubber in the atic. What about putting two 6" circular intake holes in, one on...

Thanks for the input folks. After researching Co2, how to use it, and the needed equippment, I started shopping. I'm certainly glad I didn't follow through with it, sounds like a lot of time & money would have been wasted. Thank you very much for the insight.

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...