1) Class: 37
Description: installation of solar panels, installation of solar heating systems, installation, maintenance and repair of solar energy systems, maintenance and repair of solar power installations, maintenance and repair of solar-powered heating apparatus, maintenance and repair of solar-powered heating appliances, solar heating installation maintenance and repair, installation, maintenance and repair of solar installations for generating power, installation and maintenance of solar thermal installations, installation, maintenance and repair of solar collectors, solar heating installation maintenance and repair services, maintenance and repair of solar heating installations, installation, maintenance and repair of solar installations for generating power, solar collectors and photovoltaic modules, maintenance and repair of solar thermal installations, installation, maintenance and repair of boiler systems and solar energy systems, installation, maintenance and repair of inverters, batteries and electrical connection apparatus for solar energy systems, installation of electrical wiring, electrical wiring services, electrical installation services, installation of electrical wiring for buildings, installation, maintenance and repair of electrical devices, installation, maintenance and repair of electrical equipment, repair of electrical equipment, repair of electrical equipment and electrotechnical installations, installation, maintenance and repair of apparatus for supplying electricity, installation, maintenance and repair of electrical and electronic apparatus and equipment, installation of electrical machinery and electricity generators, renovation, repair and maintenance of electrical wiring, installation, maintenance and repair of electronic, electrical and mechanical apparatus, repair of electrical apparatus, installation, maintenance and repair of apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, services of electricians, construction work relating to the installation and maintenance of electrical systems, air conditioning installation renovation, air conditioning installation refurbishment, installation of air-conditioning systems, air conditioning machine refurbishment, refurbishment of air-conditioning installations, renovation of air conditioning machines, installation of air conditioners, installation and repair of air-conditioning systems, installation of air-conditioning control systems, installation of control systems for air conditioning, installation of air-conditioning apparatus, installation, maintenance and repair of air-conditioning systems, retrofitting of air-conditioning installations in buildings, installation and repair of air-conditioning apparatus, installation, maintenance and repair of cooling and air-conditioning systems for temperature-controlled environments, installation of heating systems, repair of heating, air-conditioning and alarm installations, repair and maintenance of air conditioners, installation of heating, ventilation and air-conditioning systems, installation and repair of heating, ventilating and air-conditioning systems, installation of heating, ventilation and air-conditioning [HVAC] systems, cleaning of air conditioners, installation, maintenance and repair of heating, ventilation and air-conditioning [HVAC] systems, installation of HVAC systems, installation, maintenance and repair of HVAC [heating, ventilation and air conditioning] systems, retrofitting of heating, ventilating and air-conditioning installations in buildings, installation, maintenance and repair of electrical lighting apparatus, installation of electric light and power systems, installation of lighting systems, installation of lighting apparatus, lighting system installation, lighting apparatus installation, maintenance of lighting apparatus, installation, maintenance and repair of lighting apparatus, installation of illuminating apparatus, maintenance and repair of lighting apparatus, installation and maintenance of illuminating apparatus, repair of lighting apparatus, repair and maintenance of lighting apparatus, maintenance of illuminating apparatus, installation of heating, lighting and cooking apparatus, lighting apparatus repair, repair or maintenance of electric lighting apparatus and providing information relating thereto, repair or maintenance of electric lighting apparatus
2) Class: 42
Description: design of electrical systems, designing of electrical systems, design and planning of electrical systems, design and planning services relating to electrical systems, mechanical and electrical engineering services