Evaluation of Refurbishment in Multi-Flat Buildings Considering Ternary Benefit Daugiabu i nam renovacijos vertinimas atsi velgiant trejop naud

Inefficient heat use in old multi-flat residential buildings causes problems to the residents spending a large part of their incomes on heat bills as well as for the State working towards achieving goals of energy efficiency increase, climate change mitigation and energy security. However, the Lithuanian program of multi-flat building renovation keeps stalling, and therefore danger that much of this energy saving potential will go unrealised appears. The paper is concerned with the problems that arise when renovating multi-flat buildings according to the existing legislation. In this case, the emphasis is placed on the factors that have influence on decisions made by building owners to either participate or not in the renovation program. The paper demonstrates that the currently employed method of evaluating building renovation projects does not correctly reflect the benefits of refurbishment and gives financially unattractive financial indicators. Thus, the new method of investment distribution is introduced considering three aspects of benefits for building renovation. The case analysed demonstrates how the suggested “ternary benefit” method could be used for differentiating between financing sources and presenting relevant information to the building owners. Another related problem is heat saving assessment in the building refurbishment process. The paper argues that energy audits are far more suitable for the evaluation of modernisation projects than for energy performance certification. Article in Lithuanian Neefektyvus ilumos vartojimas senuose daugiabu iuose pastatuose yra opi problema tiek didel dal savo pajam ildymo i laidoms skiriantiems gyventojams, tiek valstybei siekiant didinti energijos efektyvum , ma inti klimato kait ir energin s nepriklausomyb s tiksl . Ta iau daugiabu i nam modernizavimo programa vis stringa ir kyla gr sm , kad energijos taupymo potencialas artimiausiu metu nebus realizuotas. Analizuojant modernizavimo procese kylan ias problemas ir ie kant j sprendimo, iame straipsnyje analizuojama dabartiniu metu taikoma daugiabu i nam modernizavimo projekt vertinimo metodika. D mesys sutelkiamas ties veiksniais, lemian iais pastato savinink apsisprendim dalyvauti modernizacijos projekte, tokiais kaip modernizavimo projekto finansinis patrauklumas. Viena i svarbi daugiabu i nam modernizavimo proces stabdan i problem yra dabartinis modernizavimo projekt vertinimo metodas. Pirma, is metodas neatspindi trejopos renovacijos naudos pastato savininkams. Antra, taikomas ilumos taupymo prognozavimo metod