The Energy Policy and Conservation Act of 1975, as amended, requires DOE to periodically review its standards for small, large, and very large commercial package air conditioners and heating equipment (also commonly known as commercial unitary air conditioners and heat pumps -- or CUACs). Under recent amendments to EPCA made by the American Efficient Manufacturing Technical Corrections Act of 2012 Pub. L. No. 112-210 (Dec. 18, 2012), DOE must review its standards for this equipment every six years and determine whether they need amending. More than six years has elapsed since the standards for this equipment were last amended. After reviewing these standards and the available data, DOE has determined that amending the current energy conservation standards for this equipment would be technologically feasible and economically justified. Accordingly, DOE is proposing to amend the current standards for this equipment.