The U.S. Department of Energy (DOE) issued DOE certification in accordance with the U.S. Energy Efficiency Regulations, which is the source of DOE certification.

 The main purpose of DOE certification is to save energy and reduce emissions, help users save electricity, limit the flow of sanitary products and save water, so as to achieve the demand of reducing energy consumption and resource waste. Now all products within the scope of DOE certification are required to meet the requirements of the latest regulations.