6 Steel alloys; steel buildings; steel tubes; steel pipes; tubes of metal; fittings of metal for compressed air ducts; aluminium; reinforcing materials of metal for pipes; reinforcing materials of metal for building; stop collars of metal; building materials of metal; framework of metal for building; hinges of metal; frames of metal; pipes of metal for central heating installations; ducts of metal for ventilating and air conditioning installations; pillars of metal for buildings; buildings of metal; manifolds of metal for pipelines.
9 Fire-extinguishing apparatus, fire engines, fire alarms; fire beaters; fire hose nozzles, pumps and fire hoses.
11 Heat accumulators; heat-recovery apparatus; steam accumulators; ionisation apparatus for the treatment of air; air-purifying apparatus and machines; air cooling apparatus; filters for airconditioning; installations for conditioning air; air filtering installations; air heaters; air dryers; air sterilisers; hot air apparatus; feeding apparatus for heating boilers; heating boilers; electric heating apparatus; taps (cocks, spigots, faucets) for pipes; solar collectors; air valves for steam heating installations; humidifiers for central heating radiators; central heating radiators; electric heating filaments; heating installations; air-conditioning apparatus; air conditioning installations; solar collectors (heating); heat exchangers; heat-recovery apparatus; thermostatic valves (parts of heating installations); fans (air-conditioning); ventilation (air-conditioning) apparatus; installations for processing fuel and nuclear moderating material.
17 Compressed air pipe fittings, not of metal; asbestos; asbestos coverings; reinforcing materials, not of metal, for pipes; pipe gaskets; water-tight rings; insulating tapes; draught excluder strips; waterproof packings; insulators for cables; weatherstripping compositions; non-conducting materials for retaining heat; compositions to prevent the radiation of heat; boiler composition to prevent the radiation of heat; insulators for electric mains; cylinder jointings; dielectrics (insulators); bark coverings for sound insulation; insulating coatings; insulating materials; insulating paints; insulators; insulating varnish; insulators ; metal foil for insulation; insulating felt; glass fibres for insulation; fibreglass fabrics for insulation; chemical compositions for repairing leaks; soundproofing materials.
19 Door frames (not of metal); reinforcing materials (not of metal) for building; framework, not of metal, for building; cement; asbestos cement; ducts, not of metal, for ventilating and air conditioning installations; building materials (non-metallic); drain pipes, not of metal; rigid pipes, not of metal.
37 Installation and repair of air conditioning apparatus; boiler cleaning and repair; heating equipment installation and repair; information on construction and repair; building construction supervision; building construction services; shielding of electric installations; damp-proofing (building); building insulating; fire alarm installation and repair.