1
Chemicals used in industry, chemicals for water maintenance; refrigerants
7
Pumps (parts for machines, motors and engines), pump installations, water pumps, domestic water pump stations, pumps for fountains, sewage pumps and construction submersible pumps, waste water pump stations, electric motors (except for land vehicles); check valves (machine parts), shut-off fittings; compressors for refrigerators; compressor and condensing units for refrigerating installations; cold water units; condensing installations; geothermal heat exchangers
9
Electric control and regulating installations, electric control and regulating installations for pump and water supply installations; photovoltaic assemblies and installations, rectifiers, inverters, voltage converters, electric measuring apparatus for electric installations, in particular for photovoltaic installations, electric cables; apparatus, instruments and installations for converting mechanical energy into electrical energy, apparatus, instruments and installations for converting heat into electrical energy, power stations, electrolytic cells, fuel cells
11
Water supply installations, water distribution installations, water conduit installations, water purifying apparatus, water purifying apparatus for swimming pools, washing water, purifying and recovery installations for vehicle washing installations; fountain installations; heat pumps, heat pump installations; refrigerant compressors, refrigerating units and air conditioning apparatus; filters (parts of household or industrial installations), water purifying filters; refrigerating apparatus and installations, refrigerating cabinets, water cooling apparatus; refrigerating machines (chillers), freezing installations; cold cabinets; cold units for process chilling, deep-freezing, normal freezing, climate cooling and industrial cooling; air-conditioning installations; installations for ripening fruit; geothermal heating apparatus; solar collectors, domestic ventilating installations for passive-energy and low-energy buildings; block-type thermal power stations, solar installations, wind-power installations, hydroelectric power stations, refrigerating machines, solar collectors
37
Installation, maintenance and repair of refrigerating apparatus, freezing machines, air conditioning installations, solar and photovoltaic installations, heat pumps and freezing installations
42
Engineering and consultancy in the field of energy and environmental technology