4
Biomass fuel; Fuel; Electrical energy; Gas fuel; Oil-gas; Solidified gas (fuel)
7
Feeding apparatus for engine boilers; Machine boiler scale collectors; Steam condensers (parts of machines); Steam/oil separators; Heat exchangers (parts of machines); Filters being parts of machines or engines; Electric generators; Condensing installations; Dust exhausting installations for cleaning purposes; Suction machines for industrial purposes; Pressure regulators; Separators; Blowing machines for the compression, exhaustion and transport of gases; Superheaters; Superchargers
11
Regulating and safety accessories for water and gas installations; Heat accumulators; Steam accumulators; Heating apparatus for solid, liquid or gaseous fuels; Gas cleaners and purifiers; Burners, boilers and heaters; Apparatus for heating; Distillation columns; Heat exchangers, other than parts of machines; Chemical processing equipment; Equipment for heating; Installations for evaporating; Furnaces, other than for laboratory use; Fire pits; Steam boilers, other than parts of machines; Incinerators; Ash conveyor installations, automatic; Hot water heating installations; Steam generating installations; Industrial treatment installations; Gas scrubbers as parts of gas installations; Refining towers for distillation
37
Building consultancy; Factory construction; Construction of gas and electricity power plants and installations (industrial installations); Burner maintenance and repair; Maintenance and repair of heating apparatus for solid, liquid or gaseous fuels; Maintenance and repair of industrial heating equipment; Construction information; Information relating to the repair of gas and electricity installations; Heating equipment installation and repair; Furnace installation and repair; Irrigation devices installation and repair; Installation and repair of gas generation, collection and distribution devices; Installation and repair of refrigerating apparatus for industry; Cleaning and repair of industrial boilers; Supervision (management) of building works
40
Rental of boilers; Destruction of waste and trash; Energy production; Rental of generators; Refining services; Recycling of waste and trash; Waste disposal [treatment of waste]; Sorting of waste and secondary raw materials (transformation); Upcycling [waste recycling]
42
Architectural services; Architectural consultation; Energy auditing; Consultancy in the field of energy-saving; Technological consultation services; Quality control; Conducting technical project studies; Surveying; Provision of scientific information, advice and consultancy in relation to carbon offsetting; Engineering services; Construction drafting; Research and development (for others); Technical research; Physics [research]; Mechanical research; Biological research; Research in the field of environmental protection