This class includes: - exterior cleaning of buildings of all types (e.g. offices, factories, shops, schools and other institutions, other business and professional premises, multi-unit residential buildings) - specialised cleaning activities for businesses in food industries, including manufacturing, retail sale, restaurants, etc. - specialised cleaning activities for buildings (e.g. facade and window cleaning, chimney cleaning and cleaning of fireplaces, stoves, furnaces, incinerators, boilers, ventilation ducts and exhaust units) - specialised industrial cleaning (e.g. cleaning of industrial machinery) - cleaning of water supply pipelines - cleaning of aeraulic ducts - other specialised building and industrial cleaning activities n.e.c. - cleaning of new buildings immediately after construction - steam cleaning, sandblasting and similar activities for building exteriors