New grow room...

Discussion in 'Grow Room Design/Setup' started by erunyon7, Aug 2, 2012.

  1. How many cfm fan would you need to ventilate a 4ft by 5ft by 2ft room??? Gonna have a 80cfm bathroom exhaust fan on the top for exhaust... Just need to kno how much intake I'll need... There will be a 400watt hps light in it... It'll be a flowering room.. Any help will be much appreciated, thanks
  2. dont think a 80cfm fan is sufficient mate..especially if the growing area ambient temp is on the high side...if i had to stick with that 80cfm fan then i'll just leave a small hole at the bottom for air intake..
  3. I would go with at least 400cfm inline that will be plenty for your space and you can run a carbon filter thru it.
  4. Agree that the bathroom fan is not enough and with the 400 cfm suggestion. Intake depends on whether you will have a passive intake or you're bringing the air in with a fan.

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