Can an intake fan help reduce heat?

Discussion in 'Growing Marijuana Indoors' started by justjoined, Nov 19, 2014.

  1. The outside temp ranges from an overnight low of 75 to a late morning high of 90. The 10" x 20" box is running 4 x 23 watt CFLs, on 18/6, with the dark period in the afternoon. Even with the lights quite high, temps can get up 95 in the late morning.
     
    I know ventilation and negative pressure is recommended, rather than intake fans. But if a fan was added to draw outside air in, blowing it straight over the seedlings, would this be a better way of keeping them cool? Or would it be better to just have the two 4" fans at the top and increase ventilation openings in the bottom?

     
  2. Sorry, double post, pls see other thread.
     

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