Preventative maintenence inspection on Trane furnace running in great condition. RP2200 filter is in new condition. Clean flame sensor and check ignitor. Visual inspection of burners. Humidifier pad in good condition. Damper opened. Test run during heating test. Test ran furnace in heating mode from thermostat. Temperature rise is within specs. Blower and inducer motors tested good. 4" galvanized B-vent in good condition. 0PPM CO detected during. System is operating properly, efficiently and ready for Winter.