best advice I can give is, get a good proportional thermostat, I recommend the herpstat. I use the older herpstat nd. many nice feature for an incubator. like high and low level alarms that you set. I also have a generator. some generators will make a thermostat go crazy. has to do with how pure the sine wave is that the generator is producing. be careful in using an ac fan as these will heat up a small incubator. and also have your incubator finish in time to give it a decent run. I ran my for weeks and did some adjusting until I had it where I wanted it. when incubating eggs. the incubator controls the temp and the egg box controls the humidity. keep it simple. good luck don