US PATENT SUBCLASS 126 / 523
.~ With heat exchanger for room heating air

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

500  DF  FIREPLACES OR ACCESSORIES {19}
523.~ With heat exchanger for room heating air {7}
524  DF  .~.~> Tubular {2}
527  DF  .~.~> Secondary outlet leads air to flame
528  DF  .~.~> Air flow path between exterior surface of heat exchanger and facing building surface {2}
531  DF  .~.~> Hollow side walls in heat exchanger
532  DF  .~.~> With means facilitating ash removal
533  DF  .~.~> With air flow regulator {1}
535  DF  .~.~> And adjustable flue damper

DEFINITION

Classification: 126/523

With heat exchanger for room heating air:

(under subclass 500) Subject matter including structure for directing inlet air along a defined flow path in contact with a surface heated by the flame or combustion gases, then directing the heated air to the inhabitable enclosure; or structure for directing hot combustion gases through a conduit within the inhabitable enclosure to a heat transmitting surface remote from the flame.

SEE OR SEARCH THIS CLASS, SUBCLASS:

521+, for heat exchangers associated with an air pump.