PHCbi brand's 11.5 cu.ft. (326 L) refrigerator and 4.8 cu.ft. (136 L) freezer combination unit is designed specifically for the storage of vaccines and other pharmaceuticals. Separate refrigeration systems and compressors allow for independent temperature controlled chambers. The freezer system maintains temperatures as low as -30°C, while the refrigerator system allows for a temperature between 2°C to 14°C. Its compressors are designed for quiet operation.