Fog machines all generally operate in the same way, so the difference between different models is in their power source and in the amount of fog they can produce. Unfortunately, even these areas are hard to quantify, so it is difficult to make comparisons between different fog machines.
Fog machines always contain between four hundred and thirteen hundred volts. The level of wattage to some degree reflects a machine’s level of heat-producing power, but other factors such as design can also impact a machine’s effectiveness in producing heat. Thus, wattage alone is not an effective indicator of a fog machine’s power.
Manufacturers of fog machines also display the number of cubic feet that their machine can produce in a given period of time. Unfortunately, there is no set standard for how densely packed a cubic foot of fog should be, so it is virtually impossible to compare the output levels of machines from these statistics.
As these differences between machines can be frustratingly ambiguous, you may want to investigate secondary issues, such as a machine’s features. What type of control does a machine have? Does it have a remote and/or a timer? How much sound will it make while it operates? Do you want a machine that you connect to light or sound boards?.
Many distributors sell industrial level fog machines, but within recent years, small-scale fog machines have also become relatively affordable. Major retailers such as Wal-Mart, Kmart, and Target, sell fog machines and put a particular emphasis on them in the weeks leading up to Halloween. If you purchase a fog machine, make sure that all of your equipment—pump, fluid, and heat exchanger—matches that machine so that you never accidentally void your warranty.