This document summarizes the analysis of various design parameters for earth air tunnel heat exchanger systems. It discusses parameters like pipe material and velocity, soil type, and operation period. The optimal velocity is found to be around 2 m/s, and higher soil thermal conductivity and longer operation periods improve system performance. Earth air tunnel heat exchangers can be an effective alternative to conventional air conditioning and using them in hybrid systems provides better results, especially for cooling in summer. Proper consideration of design factors like these helps ensure good system performance.