The combined system of this flywheel-producer translates into a receiver and distributor of energy produced by various traditional or alternative sources, directly or indirectly, via exchangers inside the flywheel. Since the latter is withdrawn the hot water needed to power the different types of heating system: high temperature if sampling takes place in the upper part of the flywheel, or low temperature for radiant soils plants if it draws the water from the bottom . This system is part of the flywheel, the preparer-accumulation for domestic hot water.