What am I looking for when I buy the fan for my incubator? Just any computer type fan? Does it need to be 12v or somehting else? Does it splice into a regular extension cord or something like a phone charger?

For the heat tape cord, temp prob ect is it best to drill the hole through the back or top or does it matter? Last question, what do you seal the hole with? I imagine it needs to be sealed good to keep heat from escaping.

Sorry for all the questions, just want to do this the right way.