Night covers are installed on existing open-type refrigerated display cases, they are deployed during the facility unoccupied hours in order to reduce refrigeration energy consumption. Deployment of night covers at the location should be deter- mined on a case by case basis. There are no demand savings for this measure because the covers will not be in use during the peak period. The main benefit of using night covers on open display cases is a reduction of infiltration and radiation cooling loads. It is recommended that these covers have small, perforated holes in order to decrease moisture buildup. Types of display cases can be found in small and medium to large size grocery stores. The air temperature inside low-temperature display cases is below 0°F, medium-temperature are between 0°F to 30°F, and high temperature are between 35°F to 55°F.