This CO2 incubator possesses superior temperature uniformity and has an interior made from one single piece of stainless steel. There are no seams or welds where contaminants could multiply. Combine this construction feature with a HEPA filter housed within a copper case and you have an incubator truly designed to minimize contamination. Another important feature is the glass inner-door, which permits viewing of samples inside the chamber without loss of control conditions. Independent heating of the outer door prevents condensation on the glass inner-door.