COGEN Europe is the European association for the promotion of cogeneration. Its principal goal is to work towards the wider use of cogeneration in Europe for a sustainable energy future. Cogeneration or Combined Heat and Power (CHP) is the most efficient way to deliver heating, cooling and electricity. It is based on the simultaneous production of electricity and thermal energy, both of which are used. The central and most fundamental principle of cogeneration is that, in order to maximise the many benefits that arise from it, systems should be based on the heat demand of the application.