Worked on the NREL/EnergyPlus repository to enhance the accuracy and clarity of energy modeling documentation. Addressed a missing zone air volume definition in the Engineering Reference, enabling more precise energy storage calculations within simulation workflows. Improved the documentation for defrost energy calculations in heating coils by clarifying that DefrostEIRTempModFac represents an energy input ratio rather than a modifier, reducing the risk of misinterpretation. Applied technical writing and engineering simulation skills, utilizing TeX for documentation updates. The work demonstrated careful attention to domain-specific details, supporting more robust design decisions and contributing to the reliability of building energy simulation tools.