| 392 / | HD | ELECTRIC RESISTANCE HEATING DEVICES |
| * | DD | HEATING DEVICES (CLASS 219 SUBCLASS 200) {11} |
| 407 | DF | .~ Radiant heater {10} |
| 422 | DF | .~.~ With reflector {4} |
| 423 | | .~.~.~ Elongated reflector {2} |
| 424 | DF | .~.~.~.~> Heating element in transparent tubular envelope |
| 425 | DF | .~.~.~.~> With exposed radiant heating element |