What is the best way to operate a heat cable system? For convenience and energy efficiency, use a system controller. System controllers have the heat cables on at the best time to prevent ice dams on the roof or in the gutter. Our controllers feature "window" operation - meaning they are on at temps between 35 and 5 degrees F. When it is warmer, natural melting occurs. When it is really cold usually there is little or no new snow, there is little heat loss melting, and the heat cables are less effective when it is that cold...
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