Everyone has seen or been in the midst of a fog machine, but many people don’t know how they work. Fog machines combine boiling water with some form of cooling agent to create steam, which the machine then emits. There are several types of fog machines, but if you want low-hanging fog, you’ll need to use a fog chiller.
Chilling the fog prevents it from rising and ensures that it lingers low to the ground. Old style machines had to use dry ice or liquid nitrogen to create this effect, but now there are models that run on simple ice cubes. These new innovations have made fog machines safer and more user-friendly.