Manufacture of electric veneers for the capture of solar heat
Manufacture of non photovoltaic recuperators of solar heat
Installation in buildings or in other projects of building of: heating systems by electricity, gas and fuel, boilers, materials and pipes for ventilation and air conditioning, etc.
Production of electro motors, electric generators and transformers
Electro-technical installation works at buildings
Electro-technical installation works, with the exception of those executed at buildings