| Model Code | Description | |
|---|---|---|
| 01 | 641.812, 641.813, 641.817, 641.893, 642.815, 642.816, 642.836, 642.837 | ADDITIONAL HEATER |
| 02 | 641.801, 641.810, 641.811, 641.894, 642.822 | ADDITIONAL HEATER |
| 03 | 641.810, 641.811, 641.812, 641.813, 641.815, 641.817, 642.815, 642.836 | L.H.D. |