1. Statistics Norway. Energy consumption in households, 2009. Retrieved on 19.09.2013 from https://www.ssb.no/en/energi-og- industri/statistikker/husenergi/hvert-2-aar/2011-04-19. Published: 19 April 2011.
2. Mauthner F, Weiss W. Solar Heat Worldwide - Markets and contribution to the energy supply 2011. Edition 2013. Retrieved on 10.09.2013 from http://www.iea-shc.org/solar-heat-worldwide.
3. Peter M. On heat consumption in buildings - User influence and saving potentials through adapted behaviour and the use of solar energy. PhD-thesis, Faculty of Mathematics and Natural Sciences, University of Oslo, to be defended 2013/2014.
4. Rudshagen passive house field, Website: http://www.rudshagen.no.
5. http://www.toshiba-aircon.de/.