The Energy Performance Certificate or EPC is the efficiency appraisement of a property, or a building. The appraisement is represented graphically on a calibration from A to G, an A stands for the highest achievement, the most efficient property and G is the lowest score and stands for the least efficient performance of a property. This allows side-by-side energy efficiency comparison of buildings the EPC depicts the ecology damage of a property in the form of its Carbon Dioxide emissions.