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.
Setting of electrical installations of heating
Other work of n.e.s. installation, including accessories installation
Work of general installation
Electro-technical installation works at buildings
Electro-technical installation works, with the exception of those executed at buildings
Plumbing works
Insulation works
Other types of building installations
Installation of heating, air-conditioning and ventilation