In 1996 we began to design an energy recovery system which gave birth to the new RE System, where RE stands for Energy Saving, the only system capable of guaranteeing a constant COP, the efficiency of a heat pump, which varies between 2 and 6. What is the innovation of this new RE System? Unlike a traditional heat pump with a gas-powered boiler, the heat pump with the new RE System allows, under certain conditions, for heating or cooling without the aid of external energy sources. Essentially, an independent ecosystem is created inside this machine, capable of self-sustaining and therefore surviving autonomously under certain conditions.