Aspiring for Added Value with Energy Efficient Building Renovation : REN2017 – a method for component-based selection and evaluation of building refurbishment options

Sammanfattning: The purpose of this study is to develop and propose a heuristic prescriptive method, REN2017, for identifying and evaluating component-based refurbishment options from an energy-economic and added value standpoint; and to evaluate the method in terms of its usefulness in a real life scenario.  This study uses an abductive single-case study approach with threads of action research encompassing primary data, from the study object and two reference objects, of on-site inspections, unstructured interviews with professionals and staff surveys. The proposed method, REN2017, is based on scientific articles and official government and organization documents within the subjects of building retrofit; energy saving; energy-efficiency-measure packages; refurbishment; added values; as well as case-specific data from qualitative document analysis. REN2017 is evaluated based on its applicability, adaptability and potency in assessing a building and identify and evaluate refurbishment options.  The study showed that the method was applicable to a 1969 modular preschool. Although the method was deemed potent and adaptable regarding the assessment of the study and reference objects as well as in the determination of its present state, it was regarded as lacking in its potency in the identification of refurbishment measures. The method enabled the evaluation of measures once identified. However, it requires further refinement of the evaluation phase regarding the connection between the energy-economic and the value-adding assessments as well as regarding the New Building analysis.