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Thread: Dehumidify UK

  1. #1

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    Default Unanswered: Dehumidify UK

    after reading lots on this and having a play about with my own set up, I'm trying to figure out the best way to achieve optimal conditions whilst keeping the humidity in the correct range.
    I'm in week 2 of flower. 2.4x1.2m room. Below is a picture graph of my temps and humidity over the last few days.
    I have been using the dehumidifier pictured. But not having much luck. Tried inside the tent and outside.
    I've been aiming for temps of 26-28 lights on and 20-22 for lights off. I'm trying to keep my humidity around 50% day and night.
    As im noticing higher temps = high Rh. Should I raise my lights off temps to 25° and lights on to 30°?
    Any other advice? Or do I have to buy one of those industrial dehumidifiers for about £500 on eBay??

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  3. #2

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    What RH is it set at?

    Looks like it cannotcope with lights on.

    I use a 8lt unit in 1.2x0.6
    Last edited by Jumper114; 14-06-20 at 05:35 PM.
    Current Grow (3L coco autos) : Jumper's 2020 shenanigans

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  5. #3

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    Ahh ...2tr ...that’s your issue ... I spent a ton on mine. Make sure it has a drainage pipe!

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  7. #4

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    Quote Originally Posted by Jumper114 View Post
    Ahh ...2tr ...that’s your issue ... I spent a ton on mine. Make sure it has a drainage pipe!
    Yeah it's got a drainage pipe all hooked up. Lowest it can go is 45% supposedly what one do you have?

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    When choosing a dehumidifier gotta make sure its worth it. good ones cost at least couple hundreds +++
    And must get at least 12 L to get a 3sqm room drop by 10-15%. Thats with 4 big plants in a 1sqm tent . Obvsly not putting the unit inside the tent just outside... that wasmy setup couple years back. Now i have twice as much and looking to get a new 16 or 20 L dehunmid. I will get either S&P or Vortice both very good brands.

    And you could keep good vpd range up until week 5 then id say keep rh at 40-50% just to avoid rot.

    Current grow

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    Are you running an oscillating fan during lights off mate? I use an oil radiator instead of a dehumidifier but 50% rh isn't too bad with all this rain we've had this past week
    Atb chap

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  13. #7

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    Quote Originally Posted by Greengrass View Post
    Are you running an oscillating fan during lights off mate? I use an oil radiator instead of a dehumidifier but 50% rh isn't too bad with all this rain we've had this past week
    Atb chap
    Yeah got a few Bigguns running 24/7. O vegged these too long as I was waiting for my other to come down that's whats not helping at all

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    I’m glad you’ve posted this, I’m looking for a dehumidifier but haven’t got a clue what to get. My tents 2x1x1 and it’s stuck at about 60% with lights out I need to get that down as I’m in the first week of flower.


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    Quote Originally Posted by Justeatit View Post
    I’m glad you’ve posted this, I’m looking for a dehumidifier but haven’t got a clue what to get. My tents 2x1x1 and it’s stuck at about 60% with lights out I need to get that down as I’m in the first week of flower.


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    Just buy a big commercial one is the only way I think.

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    Quote Originally Posted by Slazenger View Post
    Just buy a big commercial one is the only way I think.

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    Yeah it certainly looks like that! I’ve seen one on Amazon that says it’s good for a 15sqm room with a continuous drain and it’s only £40.


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  21. #11

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    Quote Originally Posted by Justeatit View Post
    Yeah it certainly looks like that! I’ve seen one on Amazon that says it’s good for a 15sqm room with a continuous drain and it’s only £40.


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    Like I've just said that's not going to do it. I've got a bigger one than that and it doesn't do the job

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    Quote Originally Posted by Slazenger View Post
    Like I've just said that's not going to do it. I've got a bigger one than that and it doesn't do the job

    Sent from my HD1900 using Tapatalk
    There have to be other options than an industrial dehumidifier.


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  25. #13

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    I’ve just bought this one. I’ll let you know how it holds up.


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