you might want to look at the Technautics Inc. modle made in Newport Beach. Both of mine have been working without a hitch for years. They draw 3 to 4 amps. Of course the duty cycle is dependent upon your insulation, door gaskets and instalation location but 3 to 4 is better then what you are looking at. He makes his own holding plates out of SS and uses finned copper tubes rather then plane copper tubes running through the plate which increases the amount of heat transfer.