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ventilation for grow box

Discussion in 'Grow Room Design/Setup' started by heavyhitter25, Dec 11, 2010.

  1. is it ok I use a small intake take fan and a larger exhaust fanfor the grow box ...

    or should i do the opposite
  2. From what I have read, you need double the intake as the exhaust, so if you have a 4" fan on exhaust you want 2 4" holes for intake, also don't put fans on intake holes, the negative pressure will keep the smell out.
  3. Big fan on the exhaust. Small or no fan on the intake.
  4. ight thanks.. big exaaust smaller intake

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