Preventative maintenence inspection on two Daikin high efficiency gas furnaces and a Daikin mini split. For gas furnaces, cleaned flame sensors and checked ignitors. Visual inspection of burners. Flush condensation trap and drain lines. Replaced air filters and checked humidifier pads. Humidifier dampers open. Run test units in heating mode from thermostats. Both systems are operating properly and within specs for temperature rise, blower and inducer motor amp draw. Pvc flue vents in good condition and no sign of leaks. 0PPM CO detected during testing. Tested operation of humidifiers during heating tests. For mini split, cleaned filters and inspected outdoor coils. Test ran operation of heating. Did not check refrigerant as there is no issues suspected at this time. All systems are operational and ready for Winter.