go4green is active in the energy management of collective heating systems for residential buildings. go4green finances the renovation of central heating systems and adds cogeneration in order to boost the energy efficiency. Users pay only for the energy (heat and electricty) that they need and don't take any risk on the gas consumption and maintenance problems, nor on administrative issues (certification, public subsidies, green certificates, etc.). go'green offers simple and efficient solutions to get quick earnings in energy savings and transform progressively your building into a green player. Our multiple successful and various experiences in medium to big collective buildings allow us to present tailor made solutions. Investing in your building with go4green will generate a huge return on investment (15 to 40%) compared to the proposals from financial markets.