What is the correct percentage of humidity in an incubator?

[InsaneBreeder]

I have seen a range of different percentages, and I would like to know the correct or generally correct one.

 

[Sweetfolly]

It depends on what you're incubating (I'm assuming chickens), and who you ask.

You'll see a pretty wide range of "correct" humidity levels, because that's what's correct for the specific incubator, or region, or altitude that person is incubating in. I think my Brinsea handbook puts the incubation humidity for chicken eggs at 45-50%

I'm sorry if that's infuriatingly unhelpful!

 

[carriehelene]

LOL, you will get a ton of answers to that question. I aim for around 35-40% until day 18. I'll tell you why. Somebody on here (don't remember the thread name), did an unofficial experiment with their broody. The used a probe type hygrometer. At the end of the experiment, it was discovered the humidity under the broody averaged around 40%. However, what was also discovered in the very very long thread was that altitude also seems to effect the needed humidity during incubation. This probably explains why there are so many answers as to what works best for people. It is my understanding that the egg needs to lose a certain amount of liquid in the egg due to evaporation for the expanding chick to grow. If you can't find the thread, let us know, I'm sure one of us will be able to link you to it. Good luck. Carrie

 

[Katy]

I agree there is not set numbers.....guidelines as to where to start yes, but it varies as to where you live. Everyone has to figure out what works best for their locale. That's why it's a good idea to start out with some cheap, local eggs till you get it figured out.

 

[bigstack]

Yep! I try to stay about 40% until day 18. Then 75-80% for lockdown. Then as they begin to hatch I open vents to allow them to dry naturaly with out losing heat. The eggs will release more humidity as they hatch and the chicks dry.

Good Luck and God Bless!

 

[InsaneBreeder]

Quote:
Do you know if more or less humidity is needed at higher altitudes? I am at about 1000 feet above sea level, and the average humidity at room temperature is around 60%. I was not able to find the link you were talking about.

 

[Chipper]

This is the link you want.It's a long thread but is also loaded with information.Good Luck !!

https://www.backyardchickens.com/forum/viewtopic.php?id=113681

 

[Cacklin" Hens]

LOL I have asked that question and got such a wide range of answers it was funny!

 

[Drew6Melton]

I go 50% and at day 18 and a half i go 75%

 

[kelseygirl707]

For chicken I always go 45%-50% until day 18 then I up it to 65%, and I have always had good hatches. Right now I have duck eggs in with the chicken eggs, so I have it at 55%, but I've done this before and had good hatches, so I think I will be fine.