Quote:
Originally Posted by Yeti
Actually they are the most stable and trusted method for low temperature cooling in many industries.
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with pre-cooled compounds you have little control over how quickly they boil off especially in low sessions there temps very a lot, where as in Refrigeration you know the temps your going to get and keep. pre-cooled compounds are undoubtedly colder but Its proven that there not great for long sessions
I think as soon as you drop below ambient condensation should be a concern whether it likely or not I think its a good habit to get it to
The more stages you add the more there is to go wrong hence cascades = more dangerous