The only wall you'll find with these units is the price tag. You could contract a refrigeration expert like ruffus, sdumper, runmc and some others to build you a cascade phase change system that could be tuned to suit you're needs for much cheaper and avoid some of the cold bug issues.
A small sized Ln2 plant probably goes for the same price of these cryo units.
__________________
What kind of community do you intend to re-build?
tell me your sins and I'll sharpen my knife...(Take me to church)
|