Completed AC installation: Installed a high-efficiency 16 SEER unit, ensuring proper sizing for optimal cooling load. Conducted ductwork modifications to improve airflow and reduce static pressure. Connected and sealed refrigerant lines, then evacuated and charged the system to manufacturer specifications using a micron gauge and digital manifold. Tested system operations, including thermostat calibration and airflow measurements, to confirm efficient and reliable performance. Finalized installation with comprehensive operational checks and customer walkthrough.