| 1/00 | Condensers in which the steam or vapour is separated from the cooling medium by walls, e.g. surface condenser |
| 1/02 | Condensers in which the steam or vapour is separated from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium |
| 1/04 | Condensers in which the steam or vapour is separated from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium employing moving walls |
| 1/06 | Condensers in which the steam or vapour is separated from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium |
| 1/08 | Condensers in which the steam or vapour is separated from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium employing moving walls |
| 3/00 | Condensers in which the steam or vapour comes into direct contact with the cooling medium |
| 3/02 | Condensers in which the steam or vapour comes into direct contact with the cooling medium by providing a flowing coating of cooling liquid on the condensing surface |
| 3/04 | Condensers in which the steam or vapour comes into direct contact with the cooling medium by injecting cooling liquid into the steam or vapour (F28B 3/08 takes precedence) |
| 3/06 | Condensers in which the steam or vapour comes into direct contact with the cooling medium by injecting the steam or vapour into the cooling liquid (F28B 3/08 takes precedence) |
| 3/08 | Condensers in which the steam or vapour comes into direct contact with the cooling medium with rotatable members |
| 5/00 | Condensers employing a combination of the methods covered by groups F28B 1/00 and F28B 3/00; Other condensers |
| 7/00 | Combinations of two or more condensers, e.g. provision of reserve condenser |
| 9/00 | Auxiliary systems, arrangements, or devices |
| 9/02 | Auxiliary systems, arrangements, or devices for feeding steam or vapour to condensers |
| 9/04 | Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid |
| 9/06 | Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid with provision for re-cooling the cooling water or other cooling liquid |
| 9/08 | Auxiliary systems, arrangements, or devices for collecting and removing condensate |
| 9/10 | Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases |
| 11/00 | Controlling arrangements with features specially adapted for condensers |