A device which creates fog by vaporizing a fluid into a fine atmosphere through a heat exchange system. Some fog machines use oil- based fluids while other fluids are water or glycol based. The type of machine and fluid used affects the quality of the atmosphere produced. Fog can be very light and rise quickly in the slightly heated air, or can be very heavy and dense and tend to hang in large clouds. Fog machines can create effects similar to haze machines, dry-ice or liquid nitrogen foggers, oil crackers, etc, but are best at producing large volumes of dense atmosphere quickly. See Also: Oil Cracker Liquid Nitrogen Fogger Dry-ice Fogger Haze Machine

A fog machine (also called a smoke machine) is a device which emits a dense vapor that appears similar to fog or smoke. This artificial fog or smoke is known as theatrical smoke and fog within the entertainment industry. Most fog machines create the fog by either vaporizing a water and glycol-based or glycerine-based fluid or by atomizing mineral oil.