US PATENT SUBCLASS 165 / 216
.~.~.~.~ Mixing of separate centrally supplied hot and cold stream before discharge into each zone (e.g., dual-duct, etc.)

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

200  DF  WITH TIMER, PROGRAMMER, TIME DELAY, OR CONDITION RESPONSIVE CONTROL {14}
201  DF  .~ Having heating and cooling capability {13}
205  DF  .~.~ Plural temperature regulators for plural zones {8}
212  DF  .~.~.~ Central temperature conditioned air supplied to each zone {4}
216.~.~.~.~ Mixing of separate centrally supplied hot and cold stream before discharge into each zone (e.g., dual-duct, etc.)

DEFINITION

Classification: 165/216

Mixing of separate centrally supplied hot and cold air streams before discharge into each zone (e.g., dual duct, etc.):

(under subclass 212) Subject matter including a means for separately directing heated or cooled air from said common supply air source toward said distinct areas; and further including means to mix said separately directed heated air with said separately directed cool air before being discharged into said distinct areas.

SEE OR SEARCH CLASS

236, Automatic Temperature and Humidity Regulation,

1, for zone control for heating and cooling medium; subclass 1 for heating and cooling control devices; subclasses 12.1+ for control devices associated with structure having mixing fluid of dissimilar temperature; subclass 13 for control devices associated with a plenum-type structure having mixing fluid of dissimilar temperature; subclass 49.3 for electrically actuated ventilator; and subclass 49.4 for pneumatically actuated ventilator.

454, Ventilation,

261, 269 for ventilation system having structure for mixing plural air streams.