11
Heat pumps; Heat pumps for energy processing; Air-source heat pump water heaters; HVAC systems (heating, ventilation and air conditioning); Apparatus for ventilating; Heat sinks for use in ventilating apparatus
19
Tanks of masonry; Ducts, not of metal, for ventilating and air-conditioning installations; Channels of non-metallic materials for transmitting air for ventilation; Air ducts of non-metallic materials for buildings; Non-metallic air vents for buildings
37
HVAC (Heating, ventilation and air conditioning) installation, maintenance and repair; Maintenance and repair of ventilating apparatus; Retrofitting of ventilating installations in buildings; Routine servicing of ventilating apparatus; Construction of geothermal energy installations; Installation of geothermal installations; Power infrastructure construction; Maintenance and repair of energy generating installations; Maintenance and repair of geothermal installations; Excavation of underground tanks
42
Consultancy in the field of energy-saving; Conducting research and technical project studies relating to the use of natural energy; Engineering services in the field of energy technology; Engineering services relating to energy supply systems; Technological consulting services in the field of alternative energy generation; Technological consultancy in the fields of energy production and use; Design and development of regenerative energy generation systems