Preventative maintenence inspection on Trane high efficiency furnace running in great condition. 20x25x4 air filter is new today. #35 humidifier pad is new today. No more filters or humidifier pads left on site. Clean flame sensor and check ignitor. Visual inspection of burners. Flush condensation trap and drain lines. Run test unit in heating mode. Temperature rise is within specs for both stages. Blower and inducer motors tested good. 3" pvc flue in good condition and no sign of leaks. 0PPM CO detected during testing. Humidifier tested during heating operation. Systems are operating properly, efficiently and ready for Winter.