In the face of escalating environmental challenges, sustainable interior design is becoming a crucial element of architectural practice. This article analyzes the possibilities of applying the principles of sustainable interior design in regenerative facilities such as spas located in natural environments, and emphasizes the role of education in preparing future interior architects to implement ecological design practices. The study encompassed a literature review, analysis of case studies, and two rounds of surveys conducted among second-semester, second-cycle Interior Architecture students at the Poznań University of Technology before and after the completion of an educational project. The results indicate a significant increase in the students' level of knowledge and ecological awareness following the educational intervention. The average percentage of correct responses in the surveys increased from 62% to 88% in terms of familiarity with ecological concepts and materials, and from 24% to 92% in ecological awareness and influencing factors. Analysis of the student projects confirmed the participants' ability to practically apply the acquired knowledge, integrating ecological, social, and economic aspects in a holistic approach to sustainable interior design. The article underscores the necessity of integrating sustainable design issues into interior architecture curricula and highlights the need for further research in this area.