books.google.fr - Many of the economic road blocks which have previously served to discourage the implementation of alternative power generation technologies can now be readily overcome through effective energy resource optimization. It is now a fact that solid financial returns can be achieved from combined heating,...https://books.google.fr/books/about/Combined_Heating_Cooling_Power_Handbook.html?id=hA129h8dc1AC&utm_source=gb-gplus-shareCombined Heating, Cooling & Power Handbook