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Mr. Krip
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  • Would a intake diameter of 4" and exhaust diameter of 6" be sufficient to create negative pressure ?Thanks in advance.
    R
    reels
    Thanks for responce,newbie on a learning curve.Forgot to mention it's for a 4x4 tent.Am I right that the cfm exhaust should be 2 or 3 times the intake? Thanks again
    Mr. Krip
    Mr. Krip
    You typically only need an exhaust fan. The intakes can be passive. If you really need an active intake (i.e. to better control temps), 2x-3x or MORE depending on how quick you need to pump the air in. There are a bunch of factors involved. You want to be able to replace all the air in your tent every 3 minutes. So you need to take the volume of your grow tent and divide that by three. You then need to oversize the fan another 20% for the carbon scrubber and more for any bends in the ducting. You'd then need to oversize that for the CFM's of any intake fan. Again, my guess would be you won't need a fan for the intake unless your tent is in extreme heat or extreme cold where you may need to actually pump cold or hot air into the room. Usually, exhausting the heat out and bringing in cool air from the room through a passive intake works fine. :goodluck:
    R
    reels
    Thanks again for info greatly appreciated:thumb:
    Right on Mr. K.! Good to see ya, and thanks for the kind words. I hope all is well in your world, and hope things are growing in your neck of the woods. Last I remember, you were into Hempy, with some purple nugs for days-Hope that's still treating you well. See you around brother.
    Thanks for the ongoing friendship and support Mr Krip. I can't tell you enough how much I appreciate it brother. :thanks:
    i was wondering how much you yielded total in that grow

    how big is your space that you are growing

    i would like to start a grow really similar to you

    i am a first time grower
    Mr. Krip! No need to worry, there is NO thing as late in out line of gardening! Thanks for the reps!!
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