1 Anti-freeze preparations for solar installations.
6 Ironmongery, small items of metal hardware; metallic pipes and tubes.
9 Photovoltaic modules, photovoltaic installations, solar controls with calorimeters, solar temperature sensors and dip sleeves, and solar heating circuit controls.
11 Energy conversion devices, solar collectors, solar collector installations; mounting units and covering frames for solar collectors; pump assemblies for solar installations; expansion tanks with diaphragms of EPDM rubber, housings of lacquered or coated steel sheets; components for solar circulation installations, namely two-way valves, three-way motor-operated valves, set-value controls, hot-water mixers, boiler safety assemblies with pressure reducers, aerators and path control valves; swimming pool absorbers; absorber installations for swimming pools; solar storage equipment, in particular double register hot water tanks, register hot water tanks, buffer storage equipment with flanges, buffer storage equipment with registers, buffer/combination storage equipment with registers, solar flow-though combination storage equipment; heat exchangers, in particular ribbed tube exchangers with flange plates, screwed radiators with control thermostats, plate heat exchangers and tubular heat exchangers; heat pumps; heat regenerators; water heaters; heat accumulators, pressure water tanks and steam accumulators, heating apparatus and heating installations; heating boilers; gas boilers with atmospheric gas burners; gas boilers with atmospheric gas burners and stored water heaters; oil boilers with oil blowing burners/steel heating boilers; oil boilers with oil blowing burners/steel heating boilers and stored water heaters; oil boilers with oil blowing burners/cast iron heating boilers; oil boilers with oil blowing burners/cast iron heating boilers and stored water heaters; condenser apparatus; incinerators; pellet heating boilers, pellet storage containers of lacquered or coated steel sheets; pellet screw conveyors and pellet suction installations; pellet boilers with heat exchangers for living areas; wood gasifier boilers; gas condenser apparatus; gas/solar compact heating plants; water heaters; radiators; radiators; floor heating apparatus and parts therefor; rainwater recovery installations.
17 Packing, stopping and insulating materials; in particular insulating tubes of closed-cell EPDM rubber for insulating metal pipes, corrugated stainless steel pipes and coils and pipes for heating boilers; hoses.
19 Building materials, pipes for building.
20 Bathroom and kitchen furniture.
35 Central business services, including advertising, business management, business administration and office functions.
37 Installation, repair and servicing of solar, heating and sanitary installations; roofing; electric installations; tubing and insulating services.
42 Technical planning of solar, heating and sanitary installations; technical planning of roofing and electric installations.