Installation in buildings or in other projects of building of: pumbling systems and hygiene appliances, pipes for gas and water (except for heating), setting of automatic extinguishers, etc.
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.
Installation in buildings or in other projects of building of: heating, cooling and ventilation systems (except heating)
Work of insulation of pipes for heating or cooling
Chimney sweeping and cleaning of hearths, ovens, incinerators, boilers, air ducts and smoke removal appliances
Plumbing works
Retail trade in sanitary products and sanitary installation materials in specialised shops
Other types of cleaning of buildings; industrial cleaning
Installation of heating, air-conditioning and ventilation