The monthly cost of running heat tape or heating cables depends heavily on the cable's total wattage per foot, local utility rates, and how frequently freezing winter storms occur. A standard residential heating cable typically draws between 5 to 9 watts per linear foot. If you operate a 100-foot cable continuously throughout a freezing winter month, it can add roughly $20 to $50 to your monthly electric bill. Utilizing a thermostatic controller ensures the cable only runs when necessary, reducing this cost.
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