Have you tested your incubator temps all over?

[Celiandy]

I have built 3 different incubators, all different sizes. I'm having the hardest time getting the temperature consistent. Granted, they're not the most fancy, but they're not bad. Made out of fridges, so they have pretty good insulation. The latest one I put a fan at the top, piping air down to the bottom where the lightbulbs and more fans are, I thought that would definitely get rid of the inconsistencies but there is still about a degree difference from highest point to lowest point. Have you tested your temps at the top, bottom, sides, near the window? Is it consistent?

 

[ChickLover98]

I did, in fact. I have a Little Giant bator, not a home made, but i guess a little temp problems are fine, cause i also had some problems.

 

[rebelcowboysnb]

Thermal layering (http://cmfarm.us/stillair.html) on a big incubator is pretty hard to break up. My big fridge incubator (http://cmfarm.us/fridgebator.html) is a side by side. That gave me a side with air going up an one with air going down. How ever you get air from the top back to the bottom it will need to move a lot of air to work on a large fridge.

 

[Celiandy]

Thanks, I didn't think I could be the only one with temp differences. I've heard people mentioning that they had consistent temps but I wonder if they just haven't moved the tstat around like a crazy person, like I have..
I figured that piping the air down to the bottom would do the trick but I guess I would need a bigger pipe (mine's 2" pvc) and a more separate heating chamber to really make the temps consistent.