Isotherm Compact Marine Refrigeration Systems make adding a refrigerator or freezer easy!These ice box conversion kits come complete, pre-charged, and ready to install. Isotherm refrigeration kits use Danfoss/SeCOP compressors to cool an evaporator or holding plate fitted in the refrigerator or deep freezer box. This unit uses seawater cooling to efficiently remove heat from refrigerated foods and includes the patented SP thru-hull pump. Isotherm ice box conversion kits come complete with compressor, evaporator, thermostat and mounting bracket or plate, and they are fully charged with quick-connect, self-sealing valves for easy installation.