Quote Originally Posted by PythonWallace View Post
Yep. fans on 24/7. And unless you have an on/off thermostat, your fans have to be on a seperate plug or hardwired before the thermostat. DC motors don't like to have their voltage messed with, so the constant adjustments made by a proportional thermostat would kill your fans in a day or so.
I am with Jake on this. here is what I use.

I use a computer fan I got at Radio Shack to circulate the air in the incubator. The one I used is a 12-volt DC fan; here is the link to it.

I use a Radio Shack variable DC Power Supply to power the fan. Here is the link to the one I used.

I didn’t want to ruin the power supply by cutting the wires to power the fan and luckily Radio Shack has an Adaptaplug with 6” Power Leads so you don’t have to. Here is the link for that.

In the past I tried using a small Radio Shack 120 volt AC fan so it could be hooked up right to regular power but if it was left on constantly it would raise the temperature over 110 degrees. The fan did that even in a large refrigerator in a room that was kept at 74 degrees. The 120 volt ones really generate a lot of heat. The 12-volt fan works great and has been on 24/7 365 days a year for the last four years.