Main parts
R model in the figure. In the L model, the parts are mirrored.
| No. | Part | No. | Part |
|---|---|---|---|
| 2a | Heat recovery cell | 6d | Post-heating liquid radiator (245 CFi VKL) |
| 3a | Extract air fan | 7a | Safety switch |
| 3c | Supply air fan | 9a | Ceiling bushing for electric wires |
| 4a | Fine filter for supply air | 10a | Control panel |
| 4b | Coarse filter for supply air | 11a | Internal carbon dioxide and humidity sensor |
| 4c | Coarse filter for extract air | 11c | Carbon dioxide sensor (optional) |
| 5a | Bypass damper of the HR cell | 11d | Humidity sensor (optional) |
| 6a | Post-heating resistor (in front of the supply air fan) | 11e | VOC sensor (optional) |