103 Proceedings of the 7 th International Renewable and Clean Energy Conference MULTICRITERIA ANALYSIS OF THE ENERGY UPGRADE OF TRADITIONAL BUILDINGS TO NZEB IN MOUNTAINOUS AREAS Ioannis Rammos (OHIWKHULD $OH[DQGUL +HOOHQLF 2SHQ 8QLYHUVLW\ 6FKRRO RI 6FLHQFH DQG 7HFKQRORJ\ $ULVWRWHORXV    3DWUDV *UHHFH 7KLV SDSHU H[SORUHV the energy upgrade of a traditional, masonry building to an nZEB, in the region of mountainous Arcadia, Greece )URP WKH  HQHUJ\ XSJUDGH VFHQDULRV H[DPLQHG WKH RSWLPXP RQH LV FKRVHQ QRW RQO\ ZLWK WKH HQHUJ\ FULWHULRQ RI SULPDU\ energy savings, but also ZLWK RWKHU  HQHUJ\ HFRQRPLF VRFLDO DQG HQYLURQPHQWDO FULWHULD )RU WKH KLHUDUFK\ RI WKHVH FULWHULD WKH Multi-Attribute Utility Theory is used. From the prioritisation of these scenarios, conclusions are drawn on the optimum scenario, not only from an energy savings point of view, but also by taking into consideration the rest of the aforementioned criteria. Keywords: (QHUJ\ XSJUDGH WUDGLWLRQDO EXLOGLQJV PXOWLFULWHULD DQDO\VLV 0XOWL $WWULEXWH 8WLOLW\ 7KHRU\ 0$87 Q=(% PDVRQU\ EXLOGLQJV 5(6 +9$& EXLOGLQJ HQYHORSH ɕɎɥɟɊɞɔɟ ɠɩɤɊɟɟɎɩɡɫɝ ɊɧɊɟɍɊɘɊɟ ɠɎɟɭɎɩɔ ɐɟɎɩɌɎɨɔɘ ɋɟɡɫɒɊɌɩɎɩɔ ɊɩɍɔɊɘɊɟɊɪɝɊɝɋ «ɌɩɎɒɎ ɏɩɡɊɘɊɟ ɐɟɎɩɌɔɊɞɔ ɠɎɟɭ»-ɔ ɧɎɩɊɗɝɊɟ ɋɊɏɝɊɢɊɬɊɟɔɠ ɧɎɩɕɡɫɗɡɫɒɞɡɫɟ ɔʏɸʍʍʂʔ ɥɸʋʏʔ, ɐʃɼʝʀɼʗʂɸ Ɋʃɼʛʔɸʍɻʗʂ əʏʙʍɸʆɸʍ ɹɸʘ ʇɸʋɸʃʔɸʗɸʍ Ɍʂʖʏʙʀʌɸʍ ʞ ʖɼʄʍʏʃʏɺʂɸʌʂ ɻʑʗʏʘ əʏʙʍɸʔʖɸʍ 263 35 ɣɸʖʗɸʔ Ɋʗʂʔʖʏʖɼʃʏʙʔ  ɐʃ ʚʏʔʖɵ MUDUFK#ZLQGRZVOLYHFRP Ɋʌʔ ʇʏɻʕɸʅʏʙʋ ʏʙʔʏʙʋʍɸʔʂʗʕʏʙʋ ɾ ɕɼʓʍɸʌʂʍ Ɋʗʆɸɻʂɸʌʂ ʖɸʗɸʅɸʎʗʒɸʍʏʙʋ ɸʕɸʍɻɸʆɸʍ ʛɸʗɼ ʎɼʍʛʂ nZEB ʋɸʆɸʗɻɸʆʂ ɾʍɼʗɺɼʖʂʆ ɸʗɻʂɸʆɸʍɸʘʏʙʋɿ: ɐʍɼʗɺʂɸʌʂ ɸʗɻʂɸʆɸʍɸʘʋɸʍ 18 ʔʘɼʍɸʗʍɼʗʂʘ ɿʍʖʗʕʏʙʋ ɾ ʜʑʖʂʋɸʃɿ ʏʐ ʋʂɸʌʍ ɸʓɸʒʍɸʌʂʍ ɾʍɼʗɺʂɸʌʂ ʄʍɸʌʏʉʏʙʀʌɸʍ, ɸʌʃ ʍɸʞ ɸʌʃɵ ɾʍɼʗɺɼʖʂʆ, ʖʍʖɼʔɸʆɸʍ, ʔʏʘʂɸʃɸʆɸʍ ʞ ɹʍɸʑɸʇʑɸʍɸʆɸʍ ʐɸʚɸʍʂʎʍɼʗʏʕ: Ɋʌʔ ʐɸʚɸʍʂʎʍɼʗʂ ʇʂɼʗɸʗʄʂɸʌʂ ʏʗʏʎʋɸʍ ʇɸʋɸʗ ʆʂʗɸʓʕɼʃ ɾ ʎɸʇɸʕɼʖʏʙ- ʀʌɸʍ ɹɸɽʋɸɹʍʏʙʌʀ ʐɸʚɸʍʂʎʍɼʗʂ ʖɼʔʏʙʀʌʏʙʍɿ: Ɋʌʔ ʔʘɼʍɸʗʍɼʗʂ ɸʓɸʒʍɸʇɼʗʀʏʙʀʌʏʙʍʂʘ ɼʃʍɼʃʏʕ ɸʗʕɼʃ ɼʍ ɼɽʗɸʆɸʘʏʙʀʌʏʙʍʍɼʗ ʜʑʖʂʋɸʃ ʔʘɼʍɸʗʂ ɺʍɸʇɸʖʋɸʍ ʕɼʗɸɹɼʗʌɸʃ, ʏʐ ʋʂɸʌʍ ɾʍɼʗɺɸʄʍɸʌʏʉʏʙʀʌɸʍ ʖɼʔɸʍʆʌʏʙʍʂʘ, ɸʌʃ ʍɸʞ ʇɸʎʕʂ ɸʓʍɼʃʏʕ ʕɼʗʏʇʂʎʌɸʃ ʐɸʚɸʍʂʎʍɼʗɿ: ə ʂ ʋ ʍ ɸ ɹ ɸ ʓ ɼ ʗ  ɾʍɼʗɺɼʖʂʆ ɸʗɻʂɸʆɸʍɸʘʏʙʋ ɸʕɸʍɻɸʆɸʍ ʎɼʍʛɼʗ ɹɸɽʋɸʇɸʖʆɸʍʂʎ ʐɸʚɸʍʂʎʍɼʗʂ ʕɼʗʃʏʙʅʏʙʀʌʏʙʍ ʎɸʇɸʕɼʖʏʙʀʌɸʍ ɹɸɽʋɸɹʍʏʙʌʀ ʐɸʚɸʍʂʎʍɼʗʂ ʖɼʔʏʙʀʌʏʙʍ ɺʗɼʀɼ ɽɼʗʏ ɸʗʖɸʍɼʖʋɸʋɹ ʎɼʍʛɼʗ ʛɸʗɼ ʎɼʍʛɼʗ ɧɎɊ ʒɼʓʏʙʘʋɸʍ ʜɻɸʚʏʄʏʙʀʌɸʍ ʜɻʏʗɸʆʋɸʍ ʇɸʋɸʆɸʗɺɼʗ ʎɼʍʛʂ ɸʗʖɸʛʂʍ ʒɼʗʋɸʋɼʆʏʙʔʂʐ ʑɸʖʏʙʋ 1. Introduction The building stock in Greece is responsible IRU  RI WKH WRWDO HQHUJ\ FRQVXPSWLRQ RI WKH FRXQWU\ >@. Old, uninsulated buildings are responsible for larger amounts of energy consumption for heating and cooling spaces than newer buildings, on whose building envelope thermal insulation has been placed, in most cases. As some of these older buildings are part of the country’s architectural heritage, it is important to investigate techniques which can achieve their energy upgrade, without jeopardising their architectural and cultural characteristics. Especially masonry buildings, whose main component is a natural, long-lasting material, such as locally produced stone, with lifelong structural characteristics (its tensile / compressive strength does not deteriorate with time), their core materials should be respected, and the building’s upgrade should be made in ways that do not endanger their durability. It is thus important to investigate techniques which can upgrade them, from an energy point of view and also respect their structural characteristics. When only the criterion of the energy efficiency upgrade is taken into consideration, conclusions are drawn about an optimum solution, which might in practice not be feasible, due to environmental, aesthetical, cultural, technical or economic obstacles, while the optimum option, from an energy savings point of view, might not be the optimal, from an environmental or economic point of view. As the foundations of sustainability lay on environment protection, social equity and economic growth >@, it is thus important to enhance the criteria of the appropriate FKRLFH VR DV WR H[DPLQH VXVWDLQDEOH HQHUJ\ XSJUDGH VROXWLRQV HQHUJ\ XSJUDGH ZRUNV VKRXOG QRW EH ORRNHG into only with energy savings criteria, but also with economic, environmental and social criteria. ɕɼʓʍɸʌʂʍ ʎʗʒɸʍʍɼʗʡʋ Mul- ticri- ǴȕȖȋȖȒȘȐȚȍȘȐȈȓȤȕȣȑ ȈȕȈȓȐȏ ȥȕȍȘȋȍȚȐȟȍșȒȖȑ ȔȖȌȍȘȕȐȏȈȞȐȐ ȚȘȈȌȐȞȐȖȕȕȣȝ ȏȌȈȕȐȑ Ȋ ȋȖȘȕȣȝ ȘȈȑȖȕȈȝ 103