“…The studied system is patented [13], regards integration into building gutters and it has been developed/tested at the University of Corsica, in France [4,5,14,15]. Three alternative configurations were evaluated: 1) collectors in series connection with tubes (for cold and hot water flow) at different levels (System 1), 2) collectors in parallel connection with the two tubes at different levels (System 2), 3) collectors in series connection with the two tubes at the same level (theoretical configuration) (System 3). The phases of material and collector manufacture, material manufacture of system additional components, system installation, use/maintenance, transportation and disposal were taken into account.…”