Ultra-low temperature (ULT) freezers are designed to operate between -86°C and -45°C, but usually operated at a set point of -70°C or -80°C. ULT freezers have a typical service life between twelve and fifteen years. When considering the replacement of a ULT ten years old, or older, there are many variables to consider. New technology solves some of the issues found in older freezers and reflects new trends in Ultra-low Range (ULR) freezer construction.