| 1/00 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station |
| 1/01 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station in which secondary air is induced by injector action of the primary air (
F24F 1/02 takes precedence) |
| 1/02 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station self-contained, i.e. with all apparatus for treatment installed in a common casing |
| 1/04 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station self-contained, i.e. with all apparatus for treatment installed in a common casing Arrangements for portability |
| 1/06 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger |
| 1/08 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Compressors specially adapted for separate outdoor units |
| 1/10 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Compressors specially adapted for separate outdoor units Arrangement or mounting thereof |
| 1/12 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Compressors specially adapted for separate outdoor units Vibration or noise prevention therefor |
| 1/14 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Heat exchangers specially adapted for separate outdoor units |
| 1/16 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Heat exchangers specially adapted for separate outdoor units Arrangement or mounting thereof |
| 1/18 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Heat exchangers specially adapted for separate outdoor units characterised by their shape |
| 1/20 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Electric components for separate outdoor units |
| 1/22 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Electric components for separate outdoor units Arrangement or mounting thereof |
| 1/24 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Electric components for separate outdoor units Cooling of electric components |
| 1/26 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Refrigerant piping |
| 1/28 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Refrigerant piping for connecting several separate outdoor units |
| 1/30 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Refrigerant piping for use inside the separate outdoor units |
| 1/32 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Refrigerant piping for connecting the separate outdoor unit to indoor units |
| 1/34 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Refrigerant piping Protection means therefor, e.g. covers for refrigerant pipes |
| 1/36 | Room units, e.g. separate or self-contained units or units receiving primary air from a central station Separate outdoor units, e.g. outdoor unit to be linked to a separate room unit comprising a compressor and a heat exchanger Drip trays for outdoor units |