Preventative maintenence inspection on Carrier high efficiency furnace running in great condition. 20x25x4 air filter is new today. Humidifier pad in good condition and damper opened. Confirmed water is on. Humidifier is operating properly. On furnace, 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. Blower and inducer motors tested good. Pvc flue vents in good condition and no sign of leaks. 0PPM CO detected during testing. Furnace is operating properly, efficiently and ready for Winter. Humidifier is operating properly. Humidity level issues are a combination of low outdoor temperature and being supplied with cold water. Due to lower cold water temperature, the Humidifier is not able to evaporate a sufficient amount compared to using hot water. System is supplied with cold water as water supply valve being used was installed by plumbers during construction. I