How much fresh air?

bald egg

In the Brooder
10 Years
Nov 16, 2009
NE Kansas
I am building an incubator and am finding very little information on vents. How much fresh air is needed? Is the air needed to hatch eggs or just regulate the humidity level? Will the humidity fall as the vents are opened? Is more air needed at lock down? Am I over thinking this? Where is the best place for vents, top, down low, behind the fan, on each end? I am useing a 54 quart cooler as my incubator. Thank You all at BYC !!! I have learned so much from this web site and gain more chicken knowlege every day.


9 Years
Jan 9, 2011
Broken Bow
I would agree with that. I built one and have 2 3/8'' holes on the bottom and 2 on the top. Sometimes I cover 1 of each up. This is also somthing I couldnt really find much info on. And the more fresh air mine pulls in, the lower the humidity gets.
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