The key to achieving a successful haze effect with a fog machine comes down to a few main factors. First, you will need a fog machine that has good low-end control; meaning that ideally, it must be able to consistently output a small trickle of fog (less critical if your application is outdoors or very large scale). Second, a long-lasting, slow evaporating fog fluid made of higher molecular weight, low vapor-pressure glycols is required. Third, a good fan is a must. Almost any fan will work if it is quiet and moves enough air to properly aerate the long-lasting fog into a haze.
By Jason Reberski in PLSN Nov. 2022 In Favor of Fog and Fans