Specialized cleaning services

**Includes:** - cleaning of computer rooms and the like - specialized cleaning services for reservoirs and tanks, these being parts of either industrial sites or transport equipment - sterilization of objects or premises (operating rooms) - furnace and chimney cleaning services - exterior cleaning of buildings of all types - cleaning of fireplaces, stoves, furnaces, incinerators, boilers, ventilation ducts and exhaust units - cleaning of transportation equipment

**Excludes:** - maintenance services for central heating installations, cf. 54631 - building exterior cleaning services when associated with building completion, cf. 54790 - cleaning services for agricultural premises (hen houses, piggeries, etc.), cf. 86122 - cleaning of carpets, upholstery, fabric, wall hangings, etc., cf. 97130