low energy buildings thermal insulation 93 savings 85 energy 84 family houses 71 heating 70 unconventional energy sources 53 more ... architectural designs 48 dwelling houses 46 buildings (architecture) 42 building designing 33 permanently sustainable development 29 ecological housing 27 sustainable architecture 26 buildings energy efficiency 25 construction materials 25 solar energy sources 24 architecture 23 evaluation of energy performance of buildings 23 office buildings 16 sustainable construction 15 wooden buildings 14 wooden constructions 14 rebuildings 13 ventilation and air-conditioning 12 internal climate 11 civil engineering 10 environment 10 architectural composition 8 windows 8 less ...