Ventilation hoods; Air driers; Air-conditioning installations; Air drying apparatus; Desiccating apparatus; Ventilation (air-conditioning) installations and apparatus; Air conditioning fans; Air-conditioning apparatus; Gas scrubbing apparatus; Air purifying apparatus and machines; Heating installations; Hot water heating installations; Central heating radiators; Metal pipes (parts of sanitary installations); Water conduits installations; Mixer taps for water pipes; Expansion tanks for central heating installations; Faucets for pipes (Am.); Taps (cocks, spigots) (faucets (Am.)) for pipes; Water distribution installations; Sanitary apparatus and installations; Water flushing installations; Sinks; Clean chambers (sanitary installations); Whirlpool-jet apparatus