This document describes a clothes dryer laboratory test procedure used to calculate an accurate metric for clothes dryer energy use. The procedure describes the different cycles, settings, clothing types and equipment needed to generate the combined energy metric referred to as the Utility Combined Energy Factor (UCEF). The resulting UCEF is based on the field test validated weighting for the five laboratory tests. The resulting test procedure more fully accounts for real world use conditions by testing dryers in a variety of operational modes with a test load composed of realistic test articles.