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Dew point

by stump about September 12, 2019 - report

Ok heres a dumb question. What do you pay attention to, Humidity or dew point?

Answers: 9 • Score 0 • Views: 337
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  • 2.547

    RbtAsq 2.547 points - September 12, 2019

    Humidity.

    Dew point is the temp where you reach 100% rh. and condensation begins.

    • Score: 0
    • stump
      stump
      1.360 points -
      September 12, 2019

      yea that's what thought but was hoping for dew point lol.

  • 12.654

    SanBoisLee 12.654 points - September 12, 2019

    When the temp reachs the dew pt you get wet so they are both about moisture in the air. Just go by humidity on your plants.

    • Score: 0
  • 7.080

    SubterraneanHomesickBooze 7.080 points - September 12, 2019

    great knowledge here!

    • Score: 0
  • 1.360

    stump 1.360 points - September 12, 2019

    it sucks as its 61 degrees out and i'm still running my air as the damn humidity is about 95 % right now so i keep the windows closed in the room with tent in.

    • Score: 0
    • Screwstick
      Screwstick
      2.375 points -
      September 13, 2019

      Only if you send me a lab coat to go with it King. In Maine the dispensaries all have a big flag with a picture of a pot leaf on it in front of the business. I wonder how often those get stolen

    • hipoldman
      hipoldman
      10.181 points -
      September 13, 2019

      Hey SS on the AC thing, you were not the only one! Lol, and I want one of those flags!

    • Screwstick
      Screwstick
      2.375 points -
      September 13, 2019

      I dont think we were fooling anyone.

    • stump
      stump
      1.360 points -
      September 14, 2019

      I know the feeling lol.

  • 3.288

    bill59 3.288 points - September 12, 2019

    Hey stump, what is the temp and rh in your grow area? RH will be lower at higher temps.

    From Google:

    If the water vapor content stays the same and the temperature drops, the relative humidity increases. If the water vapor content stays the same and the temperature rises, the relative humidity decreases. This is because colder air doesn't require as much moisture to become saturated as warmer air.

    • Score: 0
    • stump
      stump
      1.360 points -
      September 14, 2019

      I have it under control with machines . Its down to 50 outside tonight and low humidity so windows open air off.

  • 5.260

    justme 5.260 points - September 12, 2019

    I haven't had a problem with high humidity causing bud rot indoors. I keep a lot of air moving with fans though. If you have the extra money you might want to invest in a dehumidifier. I use a 70 pint Whirlpool. It will drop the humidity very quickly in my room. I try to run at a higher humidity level to match the VPD chart until my flowers start swelling and then I lower the humidity the last few weeks of flower. I think it would be ok at a higher humidity level but I hate to take the risk! I would keep the air moving with or without a humidifier. Have fun and happpy growing my friend!

    • Score: 0
    • stump
      stump
      1.360 points -
      September 14, 2019

      I have two different setups . One that is in a shed has ac and a dehumidifier . That's my main tent. I have another smaller one that is in the house has a ac but not a dehumidifier. That one is where I keep windows closed and ac on and it stays around 60%...  more

  • 2.547

    RbtAsq 2.547 points - September 12, 2019

    AC's do not make efficient dehumdifiers

    Do yourself a favor, and get a small dehumidifier. You may still need the AC on, because of the warm air from the dehumidifier, but at least you'll be able to control your rh.

    • Score: 0
    • justme
      justme
      5.260 points -
      September 14, 2019

      Do yourself another favor, don't get a cheep small dehumidifier. Over time I bought 2 mini dehumidifiers from Amazon. They would collect around 20 oz of water out of the air every 24 hours and with both running wouldn't move the humidistat any. After I ha...  more

    • justme
      justme
      5.260 points -
      September 14, 2019

      ..... It was my fault. I was trying to cut corners. That is something you should never do on the main appliances and especially your light! You will end up upgrading after you get "hooked" on growing if you don't do it right the first time!

  • 19.526

    harley24 19.526 points - September 12, 2019

    Humidity is what you pay attention to. You want high humidity in veg and low humidity in flower. As you have been told, the dew point is where the humidity hits 100% and water forms.  Peace

    • Score: 0
  • 5.922

    marlboro 5.922 points - September 13, 2019

    I’m kinda in the same boat. I’m 2 weeks into flower with 80% rh. I fired up the wood stove today to help dry things out hopefully. Low 60s with lights off and mid 70s lights on
    • Score: 0
    • Screwstick
      Screwstick
      2.375 points -
      September 13, 2019

      Wood stoves are awesome dehumidifiers

    • stump
      stump
      1.360 points -
      September 14, 2019

      yep that will dry the air.

    • king
      king
      5.988 points -
      September 14, 2019

      they cause humidity 2 swat from cutting wood. it's not that time of year yet i hope

    • marlboro
      marlboro
      5.922 points -
      September 14, 2019

      Hey king we're right on the edge of that time up here. Low 40s at night and the humidity is through the roof

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