US PATENT SUBCLASS 165 / 48.1
.~ Heating and cooling


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

47  DF  STRUCTURAL INSTALLATION {3}
48.1.~ Heating and cooling {3}
48.2  DF  .~.~> Solar
49  DF  .~.~> Radiant building panel
50  DF  .~.~> Room heat exchangers with central fluid supply


DEFINITION

Classification: 165/48.1

Heating and cooling:

(under subclass 47) Apparatus in which the installed heat exchange apparatus performs both a heating and cooling operation that is more than a mere carrying of heat between a source and a sink.