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What does dual rated mean?

A dual rated heater can be wired to either of the two voltage ratings listed on the product identification label. However, the wattage output will decrease with the lower voltage. For example: A 240/208 dual rated heater can be wired to either a 240-volt or a 208-volt supply. A 1500-watt fan heater will draw 1500 watts wired to 240 volt and 1125 watts (75% of 240 volt rating) wired to 208 volt.