Humidity level?

[Chicken12367]

Hi, I'm currently running the incubator dry and the humidity in the incubator without any eggs is sitting around 27%, I know that when the eggs are added they do increase the humidity level in the incubator but by how much I don't know. I was wondering if that humidity level is too low or is it suitable for chicken eggs through days 1-18 and then on day 18 I will raise the humidity to around 75% for hatching. What humidity % do you incubate at?
Thanks

 

[Punkybrewster]

I incubate at around 30% give or take and bump it up to 65-70% at lockdown. You should be fine. Monitor the air cells. If they look too large at any point, just increase humidity a little.