Quote Originally Posted by sho220 View Post
How "sealed" are we talking? I use a large cooler and the only opening is the small drain valve where I run the wires into the cooler. I wouldn't call it sealed, but it doesn't allow much air flow. Are you guys using 'bators that are completely sealed like an old drink cooler or wine cooler or something?
I second this question. I use a converted full-size upright freezer that still has a very good seal around the door. Like mentioned above, I have one small port where wires run out of the incubator, but that's it. I open the door to check on things maybe once a week, and have been hatching BPs with no issue for three years now. A better seal also allows more temperature stability.