WASHINGTON, July 14 -- Sub-Zero Group, Inc. submitted a public comment letter to the U.S. Department of Energy (DOE) expressing strong concerns regarding the proposed withdrawal of the determination that Miscellaneous Refrigeration (MREF) products are covered under the Energy Policy and Conservation Act. The letter, signed by Christopher M. Jessup, Corporate Director of Supply Chain & Regulatory Compliance, emphasizes the essential nature of federal preemption protections for manufacturers in th more ST