Use up to 30% less energy and experience more comfort with precise, consistent temperature control. The EnergyPlus heater uses an intelligent control and auto adjusting fan speed to maintain the desired temperature for your room within 1°. Delivering only the heat you need for maximum efficiency. New design performs even more quietly. 1600 watts at 240 volts, 1500 watts at 208 volts, and 1000 watts at 120 volts.