11
air-conditioning installations; air-conditioning apparatus; bath installations; bath fittings; bath plumbing fixtures; central heating radiators; heat exchangers, other than parts of machines; heat pumps; heating installations; hot water heating installations; heating apparatus; water-pipes for sanitary installations; radiators [heating]; regulating and safety accessories for water apparatus; sanitary apparatus and installations; taps for pipes and pipelines; toilet bowls; toilet seats; ventilation installations and apparatus; water heaters; water distribution installations; water conduits installations; water supply installations
17
Plastics and resins in extruded form for use in manufacture; packing, stopping and insulating materials; flexible pipes, tubes and hoses, not of metal; duct tapes; fittings, not of metal, for flexible pipes; fittings, not of metal, for rigid pipes; flexible hoses, not of metal; foils of metal for insulating; glass wool for insulation; insulating materials; junctions, not of metal, for pipes; pipe muffs, not of metal; self-adhesive tapes
19
brackets, not of metal, for building; branching pipes, not of metal; building materials, not of metal; building panels, not of metal; drain pipes, not of metal; drain traps [valves], not of metal or plastic; ducts, not of metal, for ventilating and air-conditioning installations; floors, not of metal; manhole covers, not of metal; mouldings, not of metal, for building; signalling panels, non-luminous and non-mechanical, not of metal; water-pipes, not of metal
37
building construction supervision; construction consultancy; electric appliance installation and repair; heating equipment installation and repair; installation and repair of air-conditioning apparatus; installation, maintenance and repair of computer hardware; pipeline construction and maintenance; plumbing
42
architectural services; architectural consultancy; construction drafting; consultancy in the field of energy-saving; engineering; water analysis