So the roof top A/C just quit and the wife wants to pack it all up and head back home. Or more seriously, in an emergency there is a patient that MUST be kept cool.
You may be aware of a device called a "swamp cooler" which is just a box of ice with a fan blowing air over it.
So here's a set of instructions for building a box of ice with a fan blowing over it.
Amazing! Yeah I bet we could all put one of these together from stuff in the camper.
http://snapguide.com/guides/make-an-...id=69945963-37