Global Cooling LLC, a 16-year-old former engineering firm, is now producing ultra-low freezers for use in the biomedical field not only is based on green technology, but also promises huge savings.The high-efficiency freezers, which keep its cargo as cold as -121 degrees Fahrenheit, are the first of their kind.The company says its new freezers cool more uniformly, more quietly and at a fraction of the energy usage or competing units. They also use no oil, unlike traditional cooling products.