I have a hova-bator with a fan and automatic thermometer and a older hava-bator without a fan and regular disk heater. I have read (well not read, had the computer read, I'm blind) that the temp for a fan incubator needs to be 99.5 degrees.right? and the non fan model needs to be 103 degrees? Is this true and why is there a difference in temperature? And thank you for the eggs..... not sure you want me to say who, but Carson loves them and can not wait to see his little babies when they hatch.