I don't have the fridge yet, and I don't want to cut off the end of the cord. I'll probably end up up-grading at some point and want the thing intact without having to go back and put one on. Also I can move this from place to place (my wife will also use it for heating an orchid room) and use it with different appliances. Once I build a fermentation chamber I'll wire it directly and mount it on the box.
Primary: 20 min IPA (14oz cascade/5gal), partigyle pale
Bottled: Orange Cream Ale, Big Red Ale, RIS, American Stout, Nut Brown Ale, American Amber Ale, Brown Porter