0BurfBest Answer 9 years ago ReplyUpvote180 degrees should be sufficient to produce fog. I built a fogmachine for my daughter's school play using the heating element from aregular clothes iron and it worked fine. I could adjust the volume ofsmoke produced simply by raising or lowering the temperature setting.BTW: you can easily make your own fog juice by mixing regular glycerinewith distilled water in a ratio of 3 parts glycerine to 1 part distilledwater, and even that doesn't have to be precise measurements. Ijust eye-balled the amounts, put it in a blender and mixed at highspeed. Worked great.