Abstract: A controlled environment system (2) for storing articles (1) in a controlled environment, comprising a container system (4), a humidity regulation system (6), a temperature regulation system (8) and an electronic control system (10) connected to the humidity and temperature regulation systems for control thereof, the container system comprising a controlled environment chamber in which the temperature and degree of humidity is regulated by the temperature and humidity regulation systems, the humidity regulation system comprising at least one chamber humidity sensor arranged to measure the humidity of the gas in the controlled environment chamber, a humidity reducing system adapted to reduce the humidity of the gas in the controlled environment chamber (12) and a humidity increasing system (18) adapted to increase the humidity of the gas in the controlled environment chamber (12).