Retro commissioning is a systematic process that aims to optimize the performance of existing buildings’ systems and equipment. It involves evaluating and fine-tuning various elements such as HVAC (Heating, Ventilation, and Air Conditioning), lighting, and control systems to ensure they operate efficiently and effectively. Through retro commissioning, building owners and managers can identify areas of improvement, implement corrective actions, and ultimately enhance energy efficiency, occupant comfort, and overall building performance.