Freezers; cold rooms; refrigerators; cooling or freezing devices not included in other subclasses (refrigerated display cabinets go to A47F3/04; household insulated containers go to A47J41/00; refrigerated trucks see classes from B60 to B64 Appropriate subclasses of; general insulated containers B65D81/38; heat transfer, heat exchange or heat storage materials, i.e. refrigerants, or materials which produce heat or cold by chemical reaction rather than combustion C09K5/00; used for liquefaction or solidification Insulated containers of gases go to F17C; air conditioning or air humidification goes to F24F; refrigeration machines, devices or systems go to F25B; freezing-free cooling of instruments or similar devices goes to G12B; cooling of engines or pumps see related classes