Space harsh environmental condition often calls for an adequate thermal regulation and insulation. In this thesis, a thermal model for a greenhouse in Mars is presented. Its objectives are to achieve and maintain suitable temperatures for the growth of the most common vegetable species, only by means of the available solar radiation. The model aims for the assessment of the viability of a bigger structure. The model is thoroughly veri ed in order to provide reliable data and then it is evaluated a number of times to assess the best parameters that yield the best performance for a set of locations. It is discussed if an active control is needed for sustaining acceptable temperatures inside the greenhouse.