US PATENT SUBCLASS 126 / 529
.~.~.~ And additional flow path through hollow walled heat exchanger

Current as of: June, 1999
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126 /   HD   STOVES AND FURNACES

500  DF  FIREPLACES OR ACCESSORIES {19}
523  DF  .~ With heat exchanger for room heating air {7}
528  DF  .~.~ Air flow path between exterior surface of heat exchanger and facing building surface {2}
529.~.~.~ And additional flow path through hollow walled heat exchanger

DEFINITION

Classification: 126/529

And additional flow path through hollow walled heat exchanger:

(under subclass 528) Subject matter wherein structure around said flame includes a wall having plates spaced apart from each other to define a conduit for receiving air from said flow path and directing the air to flow between the plates.