*Note: Some models listed below were tested using a new test procedure and have been certified as meeting new conservation standards that are mandatory for all products manufactured beginning on June 1, 2014. Those models have values in the column "Combined Energy Efficiency Ratio 2014". Models with values in that column can be compared directly to other models with values in that column, but should not be compared to models that do not have values in that column. Products certified by their manufacturer as compliant with the 2014 standards are expected to be as efficient, if not more so, than products certified to the previous standards.