6
Metal building materials; Transportable buildings of metal; Materials of metal for railway tracks; Non-electric cables and wires of common metal; Ironmongery, small items of metal hardware; Pipes and tubes of metal; Common metals and their alloys; Goods of common metal not included in other classes; Fastening element for photovoltaic modules and solar collectors; All the aforesaid goods for use in plumbing, pipelines and central heating construction and for geothermal energy, for solar installations, ventilation, cooling and air-conditioning installations, water heating and for energy supply, in particular for generating electricity or heat, except solar-selective surface sheets
7
Pumps (not included in other classes), motors and engines (except for land vehicles), except household apparatus; All the aforesaid goods for use in plumbing, pipelines and central heating construction and for geothermal energy, for solar installations, ventilation, cooling and air-conditioning installations, water heating and for energy supply, in particular for generating electricity or heat, except solar-selective surface sheets
9
Measuring, signalling and checking (supervision) apparatus and instruments, except household apparatus; Electric cables and wires of common metal; Solar cell modules; Electric and electronic apparatus for control and display elements, in particular for radiators and solar cell modules; Except solar-selective surface sheets
11
Heating apparatus, including apparatus for heating pellets, heat exchangers, solar-supported heating, heating heat pumps, and installations for large-scale production; Exhaust systems for heating apparatus; Ventilation units (except household apparatus); Apparatus for steam generating and water supply (except household apparatus); Solar collectors (not included in other classes); Solar thermal absorbers; Water reservoirs as part of heating and water supply installations, in particular hot water and service water reservoirs; Except solar-selective surface sheets