Someone please explain...

Discussion in 'Incubating & Hatching Eggs' started by Poulets De Cajun, Apr 21, 2009.

  1. Poulets De Cajun

    Poulets De Cajun Overrun With Chickens

    Why my humidity is HIGHER when the pan is nearing empty?

    When the waterpan in my big cabinet incubator is FULL, the humidity is always in the mid 40's. However, when it starts to get LOW the humidity goes up into the 50's?

    I dont understand it.

  2. Year of the Rooster

    Year of the Rooster Sebright Savvy

    Jun 27, 2008
    West Central Ohio
    Evaporation? [​IMG] Is the problem that it should be lower? or alot higher?
  3. AHappychick

    AHappychick Wanna-be Farmer

    Dec 16, 2008
    maybe because by then most of the water has evaporated creating more moisture in the air?
  4. Feathers Acres

    Feathers Acres Chillin' With My Peeps

    May 31, 2008
    I wondered why to when I put more water in my incubators the humidity goes down. I figure that the warm water collects all the humidty in the air when you put it in, and when you let it sit then the water begins to evaporate and go in the air again. Atleast thast what I think, but I dont know.

  5. MoodyChicken

    MoodyChicken Chillin' With My Peeps

    Feb 15, 2009
    Northern California
    The water evaporates faster when the pan is low. Deep pans mean nothing to humidity, wide shallow pans will shoot it right up. All about surface area.
  6. mwdh1

    mwdh1 Chillin' With My Peeps

    Mar 21, 2009
    Try filling your pan with hot water instead of room temp or cold water, it takes a while for the cool water to warm up and start to evaporate which causes a drop in humidity when adding more water into the pan.

    edited to say, the surface area of the water stays the same regardless of volume. a 9 X 13 pan has 117 sq. inches of surface area regardless of how full it is. It has more to do with the ambient temperature of the water.
    Last edited: Apr 21, 2009
  7. lechee

    lechee New Egg

    Mar 4, 2009
    Flagstaff Arizona
    Looking at your picture, when the water is full the fan is blowing across the top of your water and lowering the temp. You need to move the water or fan so that the water is only effected by the 100 degree temp. and not the fan.
  8. lechee

    lechee New Egg

    Mar 4, 2009
    Flagstaff Arizona
    The fan is acting like an evaporative cooler.
  9. Poulets De Cajun

    Poulets De Cajun Overrun With Chickens

    The water pan is self fed by a 5 gallon bucket outside of the incubator, so temperature of the water shouldn't be an issue.

    However, the fan blowing across the water sounds good. Although I dont know how I am going to move it...
  10. lechee

    lechee New Egg

    Mar 4, 2009
    Flagstaff Arizona
    You could use a lower pan and some kind of a deflector to keep the moving air off of the water or move the fan to one side with some kind of a partition to keep the air off the water.

BackYard Chickens is proudly sponsored by