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Thread: positive pressure

  1. #1

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    Default positive pressure

    hi I need help with sorting the positive pressure in my grow tent, I was using a 6 inch intake fan that was running at 275 m3/h, and I was using 5 inch extractor fan which was little less powerful so I gave bought a 5 5inch switch air fan that works at 400 cbm/h and have put the 5 inch extractor as my intake, so my extractor fan is more powerful then my intake but I still have positive pressure, when I attack the extractor to the carbon filter the flow of air is reduced a lot, I have put 2 big zip ties around it to tie it to the top of my grow tent, want to know how to fix this do i need like a 8 inch extractor fan or something because I'm running out of idea haha any help would be great .

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    Get a regulator for the intake fan so that you can adjust the speed

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  5. #3

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    Remove intake fan and run passive?




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  9. #5

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    Default

    Or a speed controller for the intake and turn it down until the tent sucks in.

    Or just get rid of the intake fan...as above.
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    What size space are you growing in mate

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  13. #7

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    Quote Originally Posted by Sadface View Post
    What size space are you growing in mate
    1mx1m mate 2m tall

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  15. #8

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    Quote Originally Posted by gardro View Post
    Remove intake fan and run passive?




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    so just open up the holes at bottom of tent and keep fan on ??

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    Quote Originally Posted by ryan2293 View Post
    so just open up the holes at bottom of tent and keep fan on ??
    Yes just a way of letting air in. If you're growing photos make sure you don't introduce a light leak though




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    Quote Originally Posted by ryan2293 View Post
    so just open up the holes at bottom of tent and keep fan on ??
    How many other ways do you want it described? ;-)

    "Simply unplug the inward blow machine and allow the outward blow machine to create negative pressure in your arena whence Velcro is separated"?

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