AWEF Chart

July 1, 2020

To evaluate the energy efficiency of a complete WICF system, the U.S. Department of Energy (DOE) uses a metric created by the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) called the Annual Walk-In Energy Factor (AWEF). As defined by AHRI, the AWEF calculation is based on “a ratio of the total heat, not including the heat generated by the operation of refrigeration systems, removed, in Btu, from a walk-in box during a one-year period of usage for refrigeration to the total energy input of refrigeration systems, in watt-hours, during the same period.”

Courtesy of Julie Havenar and Emerson Commercial & Residential solutions