6
Containers, in particular tanks, vats, of metal; High-pressure pipelines (of metal); Elbows for pipes of metal; Pipework of metal; Valves of metal; Steel structures; Junctions of metal for pipes; Manifolds of metal for pipelines
11
Compensating reservoirs for heating apparatus; Pressure water tanks; Kettles, electric; Air-conditioning apparatus; Refrigeration installations; Water-pipes for sanitary installations; Buffer storage units; Stratification tanks; Heating buffer tanks; Heat buffer tanks; Solar storage equipment; Combi tanks; Combi buffer tanks; Hygiene stratification tanks; Hygiene stratification storage tanks; Stratification storage buffer tanks; Regulating accessories for water or gas apparatus; Boiler pipes [tubes] for heating installations; Coils; Safety accessories for water or gas apparatus; Solar collectors (heating); Solar furnaces; Thermostatic valves; Incinerators; Heat pumps; Heat regenerators; Heat accumulators; Heat exchangers; Water heaters; Water heating installations; Water distribution installations; Water supply installations; Water conduit installations; Central heating radiators; Apparatus for heating, steam generating and water supply; Steam accumulators; Sanitary apparatus; Sanitary installations; Heating apparatus for solid, liquid or gaseous fuels; Heating boilers; Heating installations; Parts and accessories for the aforesaid goods, included in class 11
37
Repair, maintenance and installation work, in particular repair, maintenance and installation of apparatus for heating, steam generating and water supply, burners, ovens, storage containers, heating boilers or heating apparatus and parts and fittings for the aforesaid goods