Smart Frequency Freezers provide the ultimate temperature uniformity with the perfect combination of variable speed compressors and hydrocarbon (HC) refrigeration. Variable speed compressors will control the speed of the motor based on the heating or cooling load – substantially reducing energy without promising performance. With the hydrocarbon refrigeration technology, 50% less energy is used compared to the traditional CFC refrigerants found in standard freezers. The refrigerants do not contain fluorine or chlorine giving it a GWP value of just three, which is better for the environment. These units are applicable to many storage requirements found within blood storage facilities, hospitals, disease control, scientific research institutions, and biomedical engineering institutions.