As the global focus on sustainable building practices intensifies, architects face the challenge of designing structures that meet aesthetic and functional criteria and minimize energy consumption. A critical aspect of achieving energy-efficient buildings is the selection of appropriate building materials with optimal thermal properties. However, the integration of thermal performance analysis into the architectural design process remains a complex and underdeveloped area. This research aims to address this gap by exploring the use of OpenFOAM to develop a user-friendly tool that empowers architects to make informed decisions about material selection and its impact on energy efficiency.