The answer to 'when to service humidifier' is that you should service your home's humidifier at least once per year, typically in the fall before the heating season begins. This helps ensure the humidifier is working properly and efficiently when you need it most.
During the annual service, you should clean the humidifier, replace any filters or pads, and check for any issues like mineral buildup or leaks. This maintenance helps extend the life of your humidifier and keeps your indoor air quality at its best.