Not to rain on your parade here but I used that incubator for my first hatch and had a terrible time. I had it in my basement where the temperature is consistent and ran it for days before I set my eggs. Temperatures were all over the place no matter what I did. I hatched 2 out of 28 expensive eggs. It was the most frustrating depressing thing. If it were me I might exchange it for the brinsea eco 20 which is on sale for $99 and already has a fan. If you choose to keep it I truly wish you great hatches.