Energy Conservation Program: Test Procedure for Walk-in Coolers and Walk-in Freezers

This final rule amends the test procedure for certain walk-in cooler and freezer components by improving the procedure's clarity, updating related certification and enforcement provisions to address the performance-based energy conservation standards for walk-in cooler and freezer equipment, and establishing labeling requirements to aid manufacturers in determining compliance with the relevant standards for walk-in cooler and freezer applications. The amendments consist of provisions specific to certain walk-in cooler and freezer refrigeration systems, including product-specific definitions, removal of a performance credit for hot gas defrost, and a method to accommodate refrigeration equipment that use adaptive defrost and on-cycle variable-speed evaporator fan control.