US PATENT SUBCLASS 110 / 187
.~.~ Supplemental burner

Current as of: June, 1999
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110 /   HD   FURNACES

185  DF  WITH CONTROL MEANS RESPONSIVE TO A SENSED CONDITION {1}
186  DF  .~ Feed control {2}
187.~.~ Supplemental burner

DEFINITION

Classification: 110/187

Supplemental burner:

(under subclass 186) Apparatus wherein means are provided for controlling the addition of supplemental heat.

SEE OR SEARCH CLASS

236, Automatic Temperature and Humidity Regulation,

14, and 15 for regulation of fuel and air supply by condition of furnace or by combined boiler and furnace.