| Subject | English | German |
| auto. | catalyst retrofitting | Katalysator-Nachrüstung |
| environ. | retrofitting of old plants Making changes to old industrial plants installing new equipment's and facilities for the disposal of gas emissions in the atmosphere, of waste water and waste material in soil and water | Altanlagensanierung |
| tech. | retrofitting parts | Umrüstteile |
| construct. | seismic retrofitting | seismische Ertüchtigung |
| energ.ind. | solar retrofitting | Ankopplung an vorhandene Heizsysteme |
| energ.ind. | solar retrofitting | Nachrüstung |