Finishing up duct repair service today. Identified leaks using smoke pencils and pressure testing. Sealed leaks using UL 181-approved foil tape and mastic sealant to prevent air loss and improve system efficiency. Utilized sheet metal fabrication tools to replace damaged sections of ductwork, ensuring proper airflow distribution. Conducted airflow balancing to optimize performance across all vents. Inspected insulation for damage and replaced as needed to prevent energy loss. Conducted final pressure test to verify integrity of repairs. Documented findings and provided recommendations for further improvements to the duct system.