2016 Trane furnace running in good condition. 16x25x1 air filter is new today. Clean flame sensor and check ignitor. Visual inspection of burners. 4" galvanized B-vent in good condition and no sign of leaks. 0PPM CO detected during testing. Test ran system in heating mode from thermostat. Delta t of 45F with supply temp of 114F, spec Delta t of 30-60F. Inducer and blower motor tested within spec. System is operating properly, efficiently and ready for Winter.