Selected papers: Part I: Building Technology. A total energy design for 92 houses with combined use of solar heating and energy conservation, P V Pedersen. Haden Court energy efficient estate improvement, D Clarke & A Myer. The optimum selection of the window shading levels and of the indoor ventilation rates as a design strategy for bioclimatic commercial buildings, G Cannistraro et al. Town planning for solar energy urban development for solar rights in high latitudes, S de Schiller et al. Super-insulated windows with silica aerogel, N B Andersen. Part II: Renewable Energy and Related Topics. Sun, wind and energy at high latitudes, G S Saluja. Fourier analysis of daily solar radiation data in Egypt, M T Y Tadros & M A Mosalam Shaltout. Heliogasification of vegetal waste of agricultural production, N G Efendieva et al. A solar heating plant with seasonal storage, J O Dalenback. Investigation on solar DHW systems combined with auxiliary heaters, G A H van Amerongen & P W Bergmeijer. Prospects of a solar community for reducing environmental damage and saving possible fuels, A M Tayeb. Cooling of commercial buildings by means of large cold radiant ceilings, S Alessandro et al. Attractive small marketed hot water solar heating systems using low flow operation, S Furbo. A vapour-lift pump for solar systems, P Kjaerboe. Utilization of low grade energy sources for air-conditioning using solid-desiccant material, Y Carmi et al. Solar programme of the Federal Republic of Germany, V Lottner. Author index.