S Showroom collections can provide a sense of importance for the design of the Museum building. One of the technical requirements in the Museum showrooms is a must considering the quality of the ventilation system. In addition, the exhibition space also has a physical aspect on the function of the exhibition that is the environment that becomes the first parameter to determine its quality. The museum itself has a function to embody important collection that is already selected. However, the Museum in Indonesia has not been able to accomodate the exhibition function properly. This study intends to explain the extent to which showrooms have met the requirements of the thermal and whether that influence of thermal variables at the National Museum of Indonesia. This study can be used as a rationale to determine quality improvement measures on the ventilation system the Museum's exhibition space in the future. On the explanation of the review was presented through the study of theoretical approach and use the mixture with a mix of quantitative and qualitative methods. The Museum was selected as a case study because it meets the criteria on technical studies of the author. This study concluded that the thermal requirements in the showroom is one of the main factors who was instrumental in the showroom, the characteristics of the objects, collections, and display condition. By recommending a system of penghawaan and materials as constituents of thermal condition of a proper exhibition space, the Museum can run the role function appropriately as well. In this case, the National Museum exhibition space in the building B as the physical aspect hasn't been rated thermal requirements plays to its full potential.