Make life easy with the Willhi humidistat. This humidity controller sometimes called a Greenhouse controller will automatically turn your mist maker and fan on when the desired humidity levels fall out of the preset range, and the humidity controller will turn the fogger and waterproof fan off when the humidity reaches your preset upper level. 

This will run multiple smaller units such as (1, 3, 5 disc), or a single (6, 9, or 12 disc).

To run multiple mist makers, or a mist maker and a fan, you will need to use a small Heavy Duty GFI powerstrip.