Furnace Installation: Dispatched for new furnace installation due to heat exchanger failure in existing unit. Removed old furnace and installed new Bryant high-efficiency furnace. Assisted customer with applying the Carrier instant rebate for the heat exchanger replacement. Connected gas, electrical, venting, and ductwork, and verified proper airflow and combustion. Installed new whole-home humidifier, tied into water supply and drain, and tested operation. Completed system startup and confirmed safe, efficient heating performance.