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)
Chimney sweeping and cleaning of hearths, ovens, incinerators, boilers, air ducts and smoke removal appliances
Repair of metal products
Plumbing works
Installation of heating, air-conditioning and ventilation