The realization, supply, technical assistance, design, maintenance, installation, repair and buying and selling of sanitary, water-sanitary, refrigeration, heating, swimming pool, wellness center, burner, alternative energy, ventilation, air conditioning, irrigation systems, including solar systems. Buying and selling equipment for plant engineering and exercising a repair service in the relevant sectors, as well as taking on design mandates, building on one's own, participating in other companies, carrying out all activities in the construction sector such as chimney assembly and maintenance, metal carpentry, sheet metal work, electrical interventions, carpentry and blacksmithing work, coatings and flooring, creation of plasterboard structures and everything connected to the interventions mentioned above. Provision of labor for third parties. Any activity directly or indirectly suitable for promoting the social purpose. Purchase and sale of real estate in Switzerland and abroad. The activity of purchasing, selling, renting and importing/exporting in general.