As for quick disipating
fog, I would avoid it if using a chiller or home made version of it. Quick disipating equals something that especially in your case won't have much
thickness to it after it passes the chiller and long run of tubing. I'm still not sure about the hole patterns on the long run of hosing, I would think small holes the closer to the
fog machine, larger, the further away. Also with the chiller, I would tend to want my chilled
smoke fairly close to the
effect say within 10'. Note: I have not done this, it's just a concept for me.
As for the difference, remember
smoke rises,
fog lingers low. Two different things. Add to that
haze that kind of hangs all around but hopefully is not too noticable. Three types of
smoke effects we are talking about doing three different things.
Dry ice
fog will sit in a heavier than air low cloud that disapates as per your theater's draft and size. If you have say a 30'x20'
stage and
orchestra pit than once you raise the main it's going to be say 1' high on one 55gal. drum with say 10 minutes pump time before curtain. When the main drape is raised it's going to billow into the
orchestra pit and linger for say 20 minutes given proper pumping. Might be two drums worth of
fog - I don't remember. This is a science that you have to
play test. Aquafoggers work best by the way - much more dependable than someone's hack 55gal drum.
As for the chiller
effect I never used this but in concept, you are trying by way of chilling the
fog juice to make the
smoke heavier than air. Hot
smoke by nature is lighter than air once it's heated enough to become
smoke so chilling it is going to cut down on it's output. In other words, chilling the
smoke will be countering what's heated by the
smoke machine to make it into
smoke. This will turn it back into oil or glyconol with normal
fog fluid and only allow a limited amount of
fog goo to
escape. What you need is special
fog fluid called Cold Flow by
High End Systems and no doubt other companies which is made to be chilled and lie low with the minimum amount of turning into liquid after chilled. This I'm all again guessing about. If others don't know for sure, contact
Rosco or High End to get more details. I have a chiller in the lock up that's sold - wish it would go away I need the space, but I have never used it. The concept is at least sound in my thoughts. Avoid quick disipating stuff, go with something at least like High End's HQ fluid if not the cold flow. Think High End makes Cold Flow, otherwise it's
Martin.
Much simpler to rent a dry ice machine like a Aquafogger however.