STIRLING
Global Cooling, Inc. manufactures and sells Stirling Ultracold freezers, a new generation of environmentally friendly ultra-low storage solutions which operate between -20°C and -86°C. These freezers do not use compressor-based or cascade refrigeration systems.
They use patented free-piston Stirling engine technology that was originally developed for energy, aerospace and industrial applications before successful commercial application in ultra-low temperature cooling systems.