Just some food for thought.. they sell replacement modules

http://www.cat.com/cda/files/209009/7/pehp8041.pdf

Larry

And I thought I invented it :) Darn!

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They blew it on this one.
This is a cross counter flow but the hot tank and the cool tank
are in touch. That means what they gain in cooling in the core they lose
somewhat when heat is transfered from the hot tank forward to
the cool tank back down at the bottom.

Paul Lamar

Agreed...
Larry