What does dual rated mean?
A dual rated heater can be wired to either of the 2 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.