Is a humidifier good for chest congestion?

Usually: A cool mist humidifier can put more moisture in the air which can help with allergies, congestion and when you have a cold or the flu. Some ultrasonic humidifiers are nice, but may be a bit more expensive. I don't recommend a steam vaporizer, especially when there may be children in the house since it is full of boiling water and cause serious burns if the child gets too close or tips it over.