The Peltier technology works particularly economically at temperatures close to ambient temperature, since energy is only required if heating or cooling is needed, in contrast to compressor technology. Thus heating or cooling power can be fine tuned. In the same way as in a thermal pump, in heating operation thermal energy is removed from the ambient air and introduced into the chamber.
Because of the closed Peltier cooling system, no outside air is exchanged. The advantages: No de-humidification of the chamber and heavily reduced risk of contamination.