Not just in Korea, many of our wards also have, of course, in the patient's own money, the hospital will not be equipped with, and if the provision is also to charge.
But not all patients need to use air humidifier, some diseases can not be used. Such as arthritis, diabetics can not be used.
Some Korean dramas are not in the hospital field shot, may be in order to shoot the effect or what, every time there are scenes of the ward have air humidifier, which is not based on. Just think of it as a setup in the drama.
What we're watching is just theater, and there's still a gap with real life.