[header] How to make a fog chiller (for halloween ) [title] Buy a fog machine. [step] It's best to buy a 1000 watt fog machine, but they tend to be pricey! If you are on a budget, go with the 400 watt fog machine ($ 25-30). [title] Go to your local hardware store and buy a 10 feet (3.0 m) length of pvc pipe. 
[step] This will act as the chiller. [title] Find/buy and circular piece of wood, enough to cover one end of the pvc pipe.