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  1. D

    Intake - Exhaust: Balance, More Air In or More Air Out?

    Hello everyone! So, I am trying to find answers to this for a while. If let's say you have the possibility to fully control the Air Intake-Exhaust balance in a grow space to any extent you wish. What would be best for the plant's growth? To actually have a somewhat more intake than exhaust or...
  2. B

    Active intake Vs. exhaust

    Hi folks this is my first grow room. I cant figure out whats best in term of ventilation for making negative pressure in my flowering room. I need someone to give me some advice. My room is sealed, its 4.5 by 4.5 foot, with 5.5 foot high. I bought a 245 cfm fan and a 50 cfm fan the lady...
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