When i went to pick up my eggs to hatch, i spent over an hour with the gentlemen, talking about hatching and techniques. He Used a homemade bator similar to mine in size. I noticed he had what looked to be a metal type fan about 8/10" diam. and his heating coil looked to be a single 5kw element from the auxiliary heat strips off a residential furnace. Didnt ask(wished i had) if he was running it on 220v, or 110. I tried one from an old 220v dryer unit, running on 110v, and it got way to hot for my lil 120mm fan.. Apparently it works, but i would have thought that to much heat/air to fast would be a bad thing? Also he told me to forget about "Locking" down on day 18, that waited until the 1st bird pipped, and then locked them down..In no way am i condemning his methods(In case he is on BYC, lol) I just had some free time today, and figured i would get some opinions.