My child had RSV virus when he was only 6 months old, so even though he's 3 now, he still gets a runny nose, cough, and difficulty breathing whenever the weather changes. Many nights I see him wheezing, which is heartbreaking. But since buying this machine, every time he coughs, I only need to give him the machine for two days and the cough subsides significantly. It also helps reduce the need for antibiotics. The machine runs quietly and is very durable.