1 UCL Institute for Environmental Design and Engineering, The Bartlett, University College London, Central House, 14 Upper Woburn Place, London WC1H 0NN, United Kingdom.
2 UCL Institute for Environmental Design and Engineering, The Bartlett, University College London, Central House, 14 Upper Woburn Place, London WC1H 0NN, United Kingdom. Electronic address: f.aletta@ucl.ac.uk.
3 UCL Institute for Environmental Design and Engineering, The Bartlett, University College London, Central House, 14 Upper Woburn Place, London WC1H 0NN, United Kingdom; Eurac Research, Institute for Renewable Energy, A.-Volta-Straße/Via A.Volta 13/A, I 39100 Bozen/Bolzano, Italy.