The Thermo Scientific Low Temperature Incubator 3990LT is a 19.5 cu ft upright incubator perfect for Biochemical Oxygen Demand or other low temperature applications with the ability to hold up to 300 standard B.O.D. bottles. Peltier Cooling Technology provides energy efficiency by eliminating the need for a refrigerated compressor and heating coils, consuming 75% less power while reducing laboratory ambient temperatures and air conditioning loads. Excellent temperature uniformity doubles usable capacity and insures that all shelf areas are maintained at the proper temperatures, allowing for effective space utilization as compared to other compressor driven incubators on the market. Using no refrigerant gases, the service life is extended with no impact from projected changes for the refrigerants, making this a greener product. Heavy duty shelves, a programmable Watlow controller, RS 485 Interface, an independent over temperature thermostat and over temperature alarm are also included. The 3990LT meets the American Public Health Association ( APHA ) Specifications for Biochemical Oxygen Demand ( BOD ) and comes complete with a 1 Year Manufacturer's Parts and Labor Warranty followed by a 2nd Year Manufacturer's Parts Warranty.