Performed heating maintenance All five 20x25x4 filters are new today Replaced steam cannister for the humidifier controlled by the hearth room thermostat (south end of the house) - this humidifier does the bulk of the work and is set for maximum output capacity Master bedroom humidifier cannister in good shape Changed thermostat settings for entryway and second floor to allow for auto system changeover from heat to cool. All flame sensors are clean All condensate traps are clear All blowers are clean All burners are in good shape Run tested all 4 furnaces Wine cellar cooler is operating normally Cooler condenser coil is clean Discussed humidity set points vs outdoor temperature in relation to condensation forming on the windows Humidifiers are currently set to 40% (master bedroom and hearth room systems are the two that have humidifiers) Dehumidifier was already shut down No signs of water leaks for any system No concerns found on today's visit