US PATENT SUBCLASS 126 / 530
.~.~.~ With air flow regulator

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}
530.~.~.~ With air flow regulator

DEFINITION

Classification: 126/530

With air flow regulator:

(under subclass 528) Subject matter including means to control the amount of air flowing through said flow path.