| 122 / | HD | LIQUID HEATERS AND VAPORIZERS |
| * | DD | HORIZONTAL CYLINDER {6} |
| 195 | DF | .~ Water tube {7} |
| * | | .~.~ Water grate {5} |
| 203 | DF | .~.~.~> Downdraft |
| 204 | DF | .~.~.~> Intermediate draft |
| 205 | DF | .~.~.~> Multiple series |
| 206 | DF | .~.~.~> Solid and water bar |
| 207 | DF | .~.~.~> Updraft |