Disclosed is a control system for controlling the storage of respiratory produce in a defined confined storage environment (1). The control system includes at least one gas analysing means (2) with a control unit (20) for determining an adjusted gas medium composition of the confined storage environment (1) for protecting the produce against fermentative degradation. At least one operating/actuating means adapts the gas medium in the confined storage environment based on the determined adjusted gas medium composition. The control unit (20) determines the adjusted gas medium composition based on a mathematical model of the system. The model is used to determine the actual respiratory and fermentative rates of the produce on the evaluation of the gas exchange dynamics of the storage system with the gas exchange dynamics of the respiratory produce. The adjusted gas medium composition is determined as a function of the calculated total gas exchange rate quotient (GERQ) in the confined storage environment.
