The Consortium for Energy Efficiency (CEE) is a nonprofit group that works with manufacturers to build appliances that reduce energy consumption. Like the ENERGY STAR® rating, a CEE rating indicates that your appliance is eco-friendly and energy efficient. There are three tiers for CEE ratings, ranging from I to III, and a higher tier equates a higher level of energy efficiency. The CEE rating is not a supplement for the ENERGY STAR® label. It uses the ENERGY STAR® rating coupled with the Modified Energy Factor (MEF) and Water Factor (WF) to assess energy efficiency.