Fog in Beauty and the Beast

When we did Wizard of Oz a couple years ago, a parent rigged a fog machine for me using a vent fan with pvc piping with holes drilled in the piping at intervals. We used dry ice and it worked really well. We're doing BATB this fall and I plan to use the same thing again. We were able to put the fog right where we wanted it and dry ice dissipates faster than fog machine fog.