10 minutes on a Dewar tank –
I did some digging with some of the production houses. Attached is a paper that tells you how long a tank will last. According to Atlanta Special FX:
You need one of two tanks.
1) A 50 pound high pressure siphon tube tank. Make sure the tank has a liquid siphon tube with
the pipe that drops to the bottom of the tank to get the liquid C02.
2) A Dewar tank which is a low pressure refrigerated tank.
High pressure has 1.5 min of effect. Dewar tank has 10 minutes of effect. The average blast is 2 seconds.
They rent Cryo effects and sell them as well. If you are on the East Coast these would be a good source, although there are many others.
Travis "Big T" Russell
Big T Productions Inc
Owner and Operator of "The Plague" and "Camp Nightmare"
Customer Quote of the year: "Damn, I pissed myself"