Still air V. Circulated air incubators? Sorry in advance if this question/topic as already been addressed in the past. But due to the overwhelming number of topics and post, and my inability to find the specific questions I have, I am going to ask it again! What are the pros and cons of both still air and circulated air incubators? I understand circulated air has a fan moving the air around in the incubator. I have read here that they vent out stale air. If that is necessary for a good hatch, what purpose would a still/stale air incubator serve? Is still air and circulated air only a matter of preference? Is there a different use for each? I have found both style incubators that are exactly the same minus the fan and a $35 difference. The one with a fan costing more. Is there a $35 value difference in having the air circulated? I am looking to buy 3 incubators, will it be worth over $100 to get them with fans? Once again what are the pros and cons of both? Thanks for any help!!!!!