How much
fog are you looking for?
I've built a custom fogger for Shrek out of a plastic garbage and some aluminum dryer vent hose and an in-line vent fan. Start at the bottom and wind your vent hose up the inside of the trash can and fix it in place with eiher hot melt glue or in my case
wire. Use additional vent hose to direct the
fog where you want it.
Placed in a cement mixing pan to catch any leaking water from the holes and filled with a couple bags of ice prior to show it put's out a decent amount of
ground fog that doesn't leave any water on the floor. The aluminum vent hose conducts heat (cold in this case) fairly well and transfers the cold from the ice to the
fog causing it to hang on the floor. The vent fan goes on the
outlet side of the trash can to help pull
fog through the hose and encourages it out to wherever you want it. I just leave the vent fan on all the time (remember to use a
GFCI outlet) and place a small box fan off
stage on a
DMX relay to help
clear the
stage of any residual
fog when the scene is over. I suggest putting the whole thing on separate furniture dollies so you can move them around especially the tub with the ice can in it so you can empty it every night.
Simple, inexpensive, DMXable and stores well. Your biggest expense is a decent fogger but most production houses have them and you don't have to modify one if you need to rent one.