US PATENT SUBCLASS 126 / 528
.~.~ Air flow path between exterior surface of heat exchanger and facing building surface

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.~.~ Air flow path between exterior surface of heat exchanger and facing building surface {2}
529  DF  .~.~.~> And additional flow path through hollow walled heat exchanger
530  DF  .~.~.~> With air flow regulator

DEFINITION

Classification: 126/528

Air flow path between exterior surface of heat exchanger and facing building surface:

(under subclass 523) Subject matter wherein said heated surface is positioned in a location opposite a building wall surface so that said flow path is defined by the building wall surface and the heated surface.