The In-VitroCell ES (Energy Saver) NU-5810 Direct Heat CO2 Incubator features dual sterilization cycles as an added defensive against incubator contamination providing an optimal controlled environment for cell growth. In-VitroCell Incubators provide a stable in-vivo growth model with heating elements located on all 6 sides of the chamber. High density R5 insulation stabilizes the interior chamber temperature requiring less energy to maintain. The Closed Loop HEPA Filtration System creates ISO Class 5 Clean-room like conditions to minimize potential contamination entering the growth chamber.