| 1/00 | Arrangements of installations for producing fresh water, e.g. by evaporation and condensation of sea water |
| 2/00 | Arrangements of ventilation, heating, cooling, or air-conditioning (for vehicles in general B60H; ventilating for cleaning tanks B63B 57/04; for underwater vessels, e.g. submarines, B63G 8/36) |
| 2/02 | Arrangements of ventilation, heating, cooling, or air-conditioning (for vehicles in general B60H; ventilating for cleaning tanks B63B 57/04; for underwater vessels, e.g. submarines, B63G 8/36) Ventilation; Air-conditioning |
| 2/04 | Arrangements of ventilation, heating, cooling, or air-conditioning (for vehicles in general B60H; ventilating for cleaning tanks B63B 57/04; for underwater vessels, e.g. submarines, B63G 8/36) Ventilation; Air-conditioning of living spaces |
| 2/06 | Arrangements of ventilation, heating, cooling, or air-conditioning (for vehicles in general B60H; ventilating for cleaning tanks B63B 57/04; for underwater vessels, e.g. submarines, B63G 8/36) Ventilation; Air-conditioning of engine rooms |
| 2/08 | Arrangements of ventilation, heating, cooling, or air-conditioning (for vehicles in general B60H; ventilating for cleaning tanks B63B 57/04; for underwater vessels, e.g. submarines, B63G 8/36) Ventilation; Air-conditioning of holds (heating or cooling of liquid-freight-carrying tanks B63J 2/14; arrangements for stowing frozen goods in vessels B63B 25/26) |
| 2/10 | Arrangements of ventilation, heating, cooling, or air-conditioning (for vehicles in general B60H; ventilating for cleaning tanks B63B 57/04; for underwater vessels, e.g. submarines, B63G 8/36) Ventilation; Air-conditioning Ventilating-shafts; Air-scoops (for port-holes B63B 19/04) |
| 2/12 | Arrangements of ventilation, heating, cooling, or air-conditioning (for vehicles in general B60H; ventilating for cleaning tanks B63B 57/04; for underwater vessels, e.g. submarines, B63G 8/36) Heating; Cooling |
| 2/14 | Arrangements of ventilation, heating, cooling, or air-conditioning (for vehicles in general B60H; ventilating for cleaning tanks B63B 57/04; for underwater vessels, e.g. submarines, B63G 8/36) Heating; Cooling of liquid-freight-carrying tanks |
| 3/00 | Driving of auxiliaries (transmission elements per seF16) |
| 3/02 | Driving of auxiliaries (transmission elements per seF16) from propulsion power plant |
| 3/04 | Driving of auxiliaries (transmission elements per seF16) from power plant other than propulsion power plant |
| 4/00 | Arrangements of installations for treating waste-water or sewage (soil-water discharges B63B 29/16) |
| 99/00 | Subject matter not provided for in other groups of this subclass |