This document discusses a study that aims to reduce energy consumption in buildings by optimizing the thermal mass capacity of concrete structures through the integration of phase change materials (PCMs). The study tests two concrete panel samples, a regular concrete mix and a PCM concrete mix containing microencapsulated paraffin, and measures their heat storage, natural drainage, and drainage with forced cooling via pipes. The results show that the PCM concrete achieved higher thermal storage but was slower to release heat, necessitating forced cooling through pipes to sufficiently cool the panel overnight and allow it to absorb heat the next day, improving indoor thermal comfort.