Originally Posted by mirandaleecon
How are you coming up with the 16.5%? There are so many factors that can influence the humidity inside an incubator, the temperature inside and out, the barometric pressure, air conditioner running, etc I don't think you will be able to come up with a predictable humidity through calculations unless you are a meteorologist and even then they never seem to be right anyway.
I think you are over thinking this whole thing though. Humidity isn't so important as long as the egg loses the appropriate amount of weight. Even if X% humidity works in one incubator, it might not work in another.
Unless I'm missing some other purpose to your post, I think if you just use observation to guide you, you will be just fine!
Well, I love that you think its way more complicated than I think it is, but I am also over-thinking it...interesting dichotomy...
The air in the bator comes from the room...plain and simple...there's no water in the bator, so there's nothing changing between room and bator, other than its being warmed. I don't think a 100 egg bator can make enough of a difference in air pressure to cause some need to recalculate. So, its actually pretty simple even if the numbers aren't adding up.
The 16.5% number comes from the formulaes that say what happens when you have the numbers I have. Raise the temperature of air that has 58% RH @ 65F to 99.6F and you end up with 16.5% RH...its math. When there are no other changes to the air (e.g., no additional water, pressure changes, etc...) the resulting RH in the bator should be 16.5%...that's science.
To compare the relationship between a room and a bator in that room, to meteorology is, frankly, hilarious.
The purpose of my post is to help me figure out how I achieve 40% RH in the bator, something I have not yet been able to do with what comes with the bator.