How to Build a Fog Chiller

In this how-to, I will show the average home prop builder how to add a little magic to their fog and make it roll over the ground as if it was real.

Materials: change to suit your needs!

    • Throwaway (can be regular cooler) ice cooler from gas station (the largest you can find.)
    • Wire mesh
    • Two 4" pipe clamps
    • Two 4" PVC pipe elbows
    • Two 4" PVC pipe couplings
    • Scrap piece of 4" PVC pipe (at least 1.5 feet)
    • 4" to 1" PVC pipe converter (fitting that reduces 4" to 1")
    • Fog Machine
    • Ice


Step 1: First we must cut out holes through the two shortest sides of the cooler for the 4" PVC pipe couplings to pass through. You will glue the couplings through the walls of the cooler with some silicon caulk... make sure to use a lot as one of them will have to support some weight.

Step 2: After the caulk has set and the fittings are now in place, it is time to attach the wire mesh. Cut the wire mesh to the length of the cooler and wide enough to wrap around the couplings just once. Once that is done, lower it into the cooler and wrap it around the couplings. Attach the mesh with the two 4" pipe clamps.

Step 3: Now it is time to construct the pipe that will carry the fog to the cooler from the top through the ice. Use the two PVC elbows and 4" pipe to construct. Depending on the size of your cooler, make the pipe as long as you need it to make the reducing fitting be right in front of the output on the fog machine. Instead of using pipe glue to connect the pieces, I used hot glue just in case you make a mistake and need to undo the connection.

Step 4: Add ice to the cooler and heat up the fogger, once thats done you are all set. The ice will chill the fog as it comes out of the fogger making it heavier and thicker. The quantity of fog will be less, but the effect will be greater. I spray painted the cooler black so it would blend in with the bushes. Remember not to use too much spray paint because it will eat throught the foam.

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