The combined system of this flywheel-producer results in a loading and unloading of energy, produced by various traditional or alternative sources, either directly or indirectly via fixed exchangers inside the flywheel which act as collectors. From the flywheel it is drawn the hot water to feed the different types of heating system: high temperature if sampling takes place at the top, or at low temperature (for radiant soils installations) if it picks up water from the bottom. Throughout this system is part of the flywheel the corrugated stainless steel pipe for semirapida domestic hot water.