The fan runs constant in an incubator so you dont want that plugged into ur tstat and if u want to use it to run your rack durint the off season you can so its well worth it. I would suggest the herpstat 1 basic for 115, as for different heat sourses as long as its all the same heating emliment say 4 inch heat tape and you dont go over the rated wattage you will be fine but they will all be the same temp you wont be able to set 2 different temps with the herpstat 1
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