US PATENT SUBCLASS 165 / 130
.~ Flue formed between facing second fluid containing conduits

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

128  DF  THERMOSYPHONIC FLUE TYPE {3}
130.~ Flue formed between facing second fluid containing conduits

DEFINITION

Classification: 165/130

(under subclass 128) Apparatus in which facing structures

conducting one fluid form between them a vertically extending flue that produces flow of a second fluid.