What is the idle power draw of the AquaTru Classic? October 11, 2023 20:44 Follow When the AquaTru Classic is not in active use, it uses about 5 watts of power. Related articles How do I clean algae or mold found in the closed areas of the water dispenser on the clean water tank? How much electricity does the AquaTru Classic use? What is "Waste Water"? What is the power rating for the AquaTru Classic? What contaminants does the AquaTru Carafe purifier remove?