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  • 1.
    Bravo, Giangiacomo
    et al.
    Linnaeus University, Faculty of Social Sciences, Department of Social Studies.
    Pardalis, Georgios
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Physical vs. Aesthetic Renovations: Learning from Swedish House Owners2019In: Buildings, E-ISSN 2075-5309, Vol. 9, no 1, article id 12Article in journal (Refereed)
    Abstract [en]

    In this paper, we identify the socio-economic attributes and attitudes that have influencedhouse owners in renovating their homes in the past. Our study is based on responses to an onlinequestionnaire survey of 971 house owners living in Kronoberg County in Sweden. Results showedthat the interest and willingness of the house owners to perform a renovation varied dependingon their demographic background and the age of the house. The latter positively affected pastrenovations, only when combined with the residence time. Furthermore, the age of house ownersstrongly and positively affected the probability of performing aesthetic type of renovations, becauseof a long time of residence in the house. Younger, town living, and highly educated house ownersseem to be more concerned regarding saving energy, which motivated them to perform physicalrenovations on their house. Our results also suggest that income, level of education, and place ofresidence have an effect on renovation decisions only through their effect on the energy concern ofhouse owners, and a varied effect on renovation decisions, when combined with the time of residencein the house.

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  • 2.
    Jalilzadehazhari, Elaheh
    et al.
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Pardalis, Georgios
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Johansson, Jimmy
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Johansson, Peter
    Jönköping University, Sweden.
    Application of multi-objective optimization for resolving conflicts when selecting windows2019In: The 9th International Conference on Sustainable Development in the Building and Environment(SuDBE2019)& the International Forum of Green and Healthy Buildings., Reading and Cambridge, UK, 2019Conference paper (Refereed)
    Abstract [en]

    Sweden passed legislation to achieve a target of net zero greenhouse gas emissions by the end of 2045. The Energy Performance of Building Directive further obliged European countries to ensure zero-energy building codes and improve the quality of indoor environments when buildings are renovated, as approximately 40% of total greenhouse gas emissions in Sweden are produced while heating buildings. Windows currently play a significant role in improving the quality of indoor environments and cutting total energy consumption, thereby reducing greenhouse gas emissions and mitigating environmental impact. Selecting a suitable window design is a complicated task compounded by two main difficulties: i) the availability of multiple window designs, each with a different glazing system, size, form and position; and ii) conflict between visual comfort, thermal comfort and energy consumption. Previous studies have primarily analysed a limited selection of window designs; however, analysing a wide variety of glazing systems, sizes, forms and positions will help resolve the abovementioned difficulties, thereby ensuring zero-energy building codes while improving the quality of an indoor environment. A multi-objective optimization was therefore completed to analyse the performance of a wide variety of window design variables and select suitable designs for an office room in Sweden. The results show the potential of multi-objective optimisation to resolve the difficulties of selecting suitable window designs.

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  • 3.
    Jalilzadehazhari, Elaheh
    et al.
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Pardalis, Georgios
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Vadiee, Amir
    Mälardalen University, Sweden.
    Profitability of various energy supply systems in light of their different energy prices and climate conditions2020In: Buildings, E-ISSN 2075-5309, Vol. 10, no 6, p. 1-17, article id 100Article in journal (Refereed)
    Abstract [en]

    The majority of the single-family houses in Sweden are affected by deteriorations in building envelopes as well as heating, ventilation and air conditioning system. These dwellings are therefore in need of extensive renovation, which provides an excellent opportunity to install renewable energy supply systems to reduce the total energy consumption. The high investment costs of the renewable energy supply systems was previously distinguished as the main barrier in the installation of these systems in Sweden. House-owners should therefore compare the profitability of the energy supply systems and select the one, which will allow them to reduce their operational costs. This study analyses the profitability of a ground source heat pump, photovoltaic solar panels, and an integrated ground source heat pump with a PV system, as three energy supply systems for a single-family house in Sweden. The profitability of the supply systems was analysed by calculating the payback period (PBP) and internal rate of return (IRR) for these systems. Three different energy prices, three different interest rates, and two different lifespans were considered when calculating the IRR and PBP. In addition, the profitability of the supply systems was analysed for four Swedish climate zones. The analyses of results show that the ground source heat pump system was the most profitable energy supply system, since it provided a short PBP and high IRR in all climate zones when compared with the other energy supply systems. Furthermore, results show that increasing the energy price improved the profitability of the supply systems in all climate zones.

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  • 4.
    Jalilzadehazhari, Elaheh
    et al.
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Pardalis, Georgios
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Vadiee, Amir
    Mälardalen University, Sweden.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Profitability of various energy supply systems when renovating a single-family house in Sweden: case study2019In: International Conference on Applied Energy (ICAE 2019). August 12-15, Västerås, Sweden, 2019Conference paper (Refereed)
    Abstract [en]

    The majority of single-family houses in Sweden are affected by deteriorations in building envelopes as well as heating, ventilation and air conditioning systems, since they are about 30 years old. Theses house are therefore in need of extensive renovation, which provides an excellent opportunity to incorporate energy efficiency measures to reduce both the energy consumption and also operational. Although former studies analyzed the cost effectiveness of various renovation packages, they mainly excluded the evaluation of energy price implications on cost effectiveness of different renovation package in Sweden. Accordingly, this study considers three energy prices and quantifies the payback period (PBP) and internal rate of return (IRR) of the packages, when renovating a single-family house in Sweden. The renovation packages included three distinct energy supply systems, commonly installed when implementing energy renovations: ground source heat pump (GSHP), photovoltaic solar panels (PV), and an integrated GSHP and PV system. The analyses of results show that a the GSHP system provides higher IRR and the lowest PBP compared to the other two renovation packages, due to its high performance in reducing energy consumption and its relatively low investment cost. Furthermore, results show that raising the energy price can increase the IRR and reduce the PBP of the renovation packages and respectively. Moreover, increasing the interest rate adds on PBP of renovation packages, since it depreciates the cost for saved energy. 

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  • 5.
    Mahapatra, Krushna
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Pardalis, Georgios
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Homeowners’ attitude towards one-stop-shop business concept for energy renovation of detached houses in Kronoberg, Sweden2019In: Innovative Solutions for Energy Transitions: 10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China / [ed] Yan, J; Yang, HX; Li, H; Chen, X, Elsevier, 2019, Vol. 158, p. 3702-3708Conference paper (Refereed)
    Abstract [en]

    Based on an online questionnaire survey, this paper analyses the attitude of homeowners in Kronoberg, Sweden towards energy renovation and one-stop shop (OSS) services for the deep renovation of detached houses. Personal and contextual variables have been analysed to know who have renovation plan, what motivates them to renovate and if there is an interest in OSS concept. Results have shown that at present a very small section of the homeowners' have deep renovation plan. The priority is rather on aesthetic renovation than energy renovation. Younger homeowners below 36 years could be the first potential customer segment for deep renovation. The attitude towards OSS business concept of one entrepreneur-offering package solutions currently is not so encouraging. There is a need to demonstrate a cost-efficient OSS business concept for deep renovation ensuring the quality of the work to accelerate the deep renovation under such a business concept.

  • 6.
    Mainali, Brijesh
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Pardalis, Georgios
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Evaluating Existing Market for Deep Energy Renovation in Sweden and Denmark2018In: Advanced Building Skins: C2 Models, Policies and Products for Building Retrofit, Wilen (Sarnen): Advanced Building Skins. ABS, 2018, p. 576-580Conference paper (Other academic)
    Abstract [en]

    Buildings are responsible for 40% of energy consumption and 36% of CO2 emissions in the EU. Sweden andDenmark are cold climatic countries with strong demand for space heating and hot water in the residentialsector. Large section of the detached houses in these countries are built more than 30 years ago and needrefurbishment. Despite of huge energy saving potentials with deep renovation of these houses, there existsseveral challenges in realizing those saving potentials. This paper evaluates the market for deep renovation ofsingle-family houses in these two Nordic countries using PEST and SWOT analysis. Comparative analysisbetween two countries will help to understand the common and country specific drivers and barriers and todevelop strategic recommendation in accordance.

  • 7.
    Mainali, Brijesh
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Pardalis, Georgios
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Strategies for deep renovation market of detached houses2021In: Renewable & sustainable energy reviews, ISSN 1364-0321, E-ISSN 1879-0690, Vol. 138, p. 1-10, article id 110659Article in journal (Refereed)
    Abstract [en]

    Deep renovation of the buildings is a key for sustainable development, however, the rate of deep renovation of residential buildings in the European Union (EU) is lower than what is required to meet the climate and energy goals. This paper analyses peculiarities and commonalities in market conditions and approaches to the deep renovation of single-family (or detached) houses in Denmark and Sweden. The market analysis covers the Political, Economic, Social, and Technical (PEST) dimensions and is based on systematic literature review and findings of market gap analysis. The PEST analysis is complemented with responses from 49 stakeholders/experts to examine the strengths, weaknesses, opportunities, and threats (SWOT analysis) for the deep renovation market. The synthesis of SWOT and PEST led to some strategies for deep renovation. Furthermore, policies and strategies adopted by some other countries have been discussed to place findings from this study in the regional and global context. Capacity building in designing and managing deep renovation with technological advancement and construction practices; and enforcement of quality assurance systems of artisans could avoid the perceived risk, and inconveniences associated with renovation. Encouraging systematically planned stepwise deep renovation through One-Stop shop and linking such renovation with appropriate financing mechanism could attract more homeowners with financial limitations. Besides, clustering several houses in need of renovation and appropriate energy/carbon pricing mechanisms could make the renovation market more attractive for investors and construction companies. The findings of this paper are of interest to construction companies, policymakers, investors, and analysts about the deep renovation market.

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  • 8.
    Mainali, Brijesh
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Pardalis, Georgios
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Criteria based approach for assessment of policy instruments for deep renovation of residential building in the Netherlands2019In: ECEEE Summer Study proceedings: eceee 2019 Summer Study on energy efficiency: Is efficient sufficient?, European Council for an Energy Efficient Economy (ECEEE), 2019, p. 599-606, article id 3-352-19Conference paper (Refereed)
    Abstract [en]

    The building sector is responsible for more than 40 % of the energy use and 32 % of carbon dioxide emissions in the European Union (EU). Previous research has shown that the present rate of energy retrofit and refurbishment in Europe is far below (<50 %) than that is required to meet the EU's building related energy efficiency goals for 2020. Appropriate policy interventions for deep renovation is perceived as a catalytic agent in promoting energy efficiency and leveraging more investments in the building sector. EU directives regarding Energy Efficiency reflects in various member states' national targets and policy measures to improve the energy performance of the existing building stocks. Economic policy instruments seem to be influential in steering the deep renovation market, but this alone may not be sufficient for the sustainable growth of the market. There is a need for market-based approach to enhance the private sector involvement, both in terms of technical and financial capabilities. This paper evaluates the policy instrument used for promoting deep renovation of residential buildings in the Netherlands. A "Theory-based evaluation" technique has been used in analyzing the content of the policy instrument, and the underlying theories and policies, at output and impact level. A set of the evaluation criteria have been applied for assessing such policy instruments in leveraging energy efficiency investments and their effectiveness in terms of energy savings. The assessments are done based on the meta-analysis of relevant literature and data sources, and finalized in consultation with the Dutch partners from INNOVATE (Integrated solutions for ambitious energy refurbishment of private housing) project under Horizon 2020. Further, the challenges for scaling up such existing effort for the sustainable growth of the deep renovation market has been explored.

  • 9.
    Pardalis, Georgios
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Prospects for the Development of a One-Stop-Shop Business Model for Energy-Efficiency Renovations of Detached Houses in Sweden2021Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The building sector is the biggest energy user in the European Union (EU) and therefore, has an important role to play in meeting the energy and climate goals ofEU. In Sweden, more than 80% of the two million detached houses are more than 35 years of age. Energy efficiency renovation of those old houses can reduce primaryenergy use by 65% to 90%. However, the current low rate of energy renovations (yearly about 1% of the building stock) in the EU in general must at least be doubledto meet the energy and climate goals. The low rate of renovations is attributed, among others, to the fragmented market where various actors offer their service in piecemeal approach and homeownersundergo a complex decision-making process. The introduction of innovative collaborative business models can simplify that complex process and eventuallyaccelerate the rate of energy efficiency renovations. One-stop-shop (OSS) business model is one such model where a single actor coordinates other actors in therenovation value chain to offer comprehensive renovation packages. This model has started to emerge in some parts of the EU, but the knowledge about it remainslimited in the Swedish context.

    To examine the prospects for the development of an OSS in the Swedish context, this research investigated the demand (homeowners) and supply-side (professionals)of house renovations, as well as, the general market conditions to develop strategies to promote energy renovation. Online questionnaire survey of homeowners wasconducted covering Kronoberg county (year 2017, 971 answers) and whole Sweden (year 2018, 12194 answers). Interviews were conducted with 21 owners/managersof micro-and small-sized construction enterprises, which are dominant in the house renovation market. Furthermore, 16 interviews were conducted with the ProjectManagers of 4 medium-sized construction enterprises, 4 Loan Officers from four large Swedish banks, and 8 brokers from real-estate agencies. In addition, interviewshave been conducted with the energy advisors of the eight municipalities of Kronoberg County. An analysis based on transaction cost economics and resourcebased theory was conducted to identify the conditions under which the OSS conceptcould emerge in the Swedish market. Market gap analysis, systematic literature review, and consultation with 11 Swedish and international experts in the energyefficiency renovation market, formed the basis for proposing strategies to supportrenovations.

    The findings demonstrate that the house's age and the age of the homeowner, as well as, annual household income and environmental and energy awareness of thehomeowner, are the factors influencing renovation decisions and homeowners'  propensity to undertake energy-efficiency renovations. Findings also demonstratethat there are several homeowners capable to constitute a segment of potential early adopters for one-stop-shop. Regarding supply-side actors, the findings demonstratethat, in theory, one-stop-shop is viewed positively, but still supply-side actors are hesitant to adopt the concept, mainly due to the lack of resources and managementcompetence, as well as, the perceived risks associated with a change of their business model. Nevertheless, this research identified two supply-side actor profiles, whounder certain conditions, could be the coordinators of a one-stop-shop. Strategies are also proposed, to make market conditions conducive for energy-efficiencyrenovations in detached houses.

    In conclusion, the overall prospects for the development of one-stop-shop for energy-efficiency renovations of detached houses in Sweden can be characterized asmoderately positive. This thesis provides insights on the key issues to be addressed, for one-stop-shop to achieve an acceptable market success and provide a sustainablebusiness to the professionals wishing to become active in the renovation market under this concept.

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  • 10.
    Pardalis, Georgios
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Bravo, Giangiacomo
    Linnaeus University, Faculty of Social Sciences, Department of Social Studies.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Swedish House Owners’ Intentions Towards Renovations: Is there a Market for One-Stop-Shop?2019In: Buildings, E-ISSN 2075-5309, Vol. 9, no 7, p. 1-16, article id 164Article in journal (Refereed)
    Abstract [en]

    In this paper, we examine factors aecting owners’ intention for renovation of their detached houses. Furthermore, we analyze their interest in choosing a one-stop-shop (OSS) service for the renovation, even though such a concept is not yet established in Sweden, but emerging in other parts of Europe. Our study is based on responses to an online questionnaire survey of 971 house owners residing in Kronoberg Region in Sweden. About 76% of the respondents intend to renovate in the near future, with approximately 71% of them preferring to renovate individual components of their dwelling and 5% to renovate their whole house in steps. House owners of younger age, higher income, higher education, and those with an interest for environmental issues, were the ones most interested in physical renovations, which improves energy efficiency of the building. For those house owners, one-stop-shop can facilitate the decision-making process, and help them to choose those measures that will improve their quality of life. Approximately 20% of the respondents had a positive view towards an one-stop-shop, which is an indicator that market for such a service exists. Parameters such as quality of work, cost and energy savings and specification of measures to be adopted are the key for the promotion of one-stop-shop. Additionally, house owners want to have a certain level of involvement in the selection of actors performing the renovation. Moreover, financial incentives, e.g., loans, do not play a significant role for the selection of one-stop-shop, but act as complementary motive for house owners.

  • 11.
    Pardalis, Georgios
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    A business model canvas framework for sustainable one-stop-shops2022Conference paper (Refereed)
    Abstract [en]

    The Sustainable Business Model Canvas (SBMC) offers a useful tool for business model design, as it manages to integrate all three dimensions of sustainability without distinguishing between three different layers (economic, environmental, and social). This paper presents the application of SBMC in a real study case of a one-stop-shop (OSS) for the renovation of single-family houses operating inKronoberg province in Sweden. The case is based on shifting from the current approach of the OSS, making interventions that will lead to the development of a "new" OSS which can reach the highest possible sustainability potential. A two-stage comprehensive assessment process for the "new" model is proposed, following a lifecycle perspective. The use of SBMC and the assessment process allows both existing and under-development OSSs to gain a better understanding of different alternatives regarding their business, and how these alternatives improve or weaken their existing business model. This work also proposes the steps that should be followed to assess the impact of potential intervention in the business model on the sustainability performance of an OSS. There is a need though to acquire relevant data to make a more detailed evaluation of the economic, environmental, and social burdens and benefits of an OSS. Such an evaluation will lead to more well-informed interpretations regarding the sustainability performance of different OSSs.

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  • 12.
    Pardalis, Georgios
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    A triple-layered one-stop-shop business model canvas for sustainable house renovations2020In: WSBE 20 - World Sustainable Built Environment: Beyond 2020 2-4 November 2020, Gothenburg, Sweden, Bristol, United Kingdom: IOP Publishing , 2020, Vol. 588, article id 022060Conference paper (Refereed)
    Abstract [en]

    Triple Layer Business Model Canvas (TLBMC) is a tool helping us to explore sustainability-oriented business model innovation. It extends the business dimension of the canvas with the addition of an environmental dimension based on life cycle perspective and a social dimension based on stakeholder perspective. A combined consideration of the three dimensions of the business model allows us to understand how an organization generates economic, environmental and social values. This paper presents the TLBMC of One-Stop- Shop (OSS) business model for energy renovation of detached houses. This three-layer canvas allows us to under- stand how OSS creates different types of values related to energy renovation, by using elements of life-cycle analysis and stakeholder management. It also contributes to the identification of gaps in research on energy renovation of detached houses, which need to be filled in order to better quantify the benefits of energy efficient renovation in those dwellings and develop such an OSS that will serve better the growing needs of the urban environments of the future.

  • 13.
    Pardalis, Georgios
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Comparing public- and private-driven one-stop-shops for energy renovations of residential buildings in Europe2022In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 365, article id 132683Article in journal (Refereed)
    Abstract [en]

    Energy efficiency in buildings remains an important priority for the European Union. Towards that direction, the role of the one-stop-shops (OSSs) that will offer integrated renovation services has been further enhanced. The paper aims to compare public and private-driven OSSs to increase knowledge regarding the way they operate. The business models of ten OSSs for the renovation of residential buildings, operating in six European countries have been analyzed, and further evaluated for their engagement in the critical moments of the renovation customer journey. Findings show that the majority of examined OSSs have managed to reach some level of standardization in the way they deliver their service. Additionally, the examined OSSs appear to be engaged in the critical moment of the renovation customer journey, which can attract the interest of potential customers. Public-driven OSS appears to operate smoother in the renovation market and offer services that are considered crucial for their potential customers. Their viability though in the absence of public funding needs to be further examined. On the other hand, private-driven OSSs are called to deal with greater challenges in their effort to consolidate their presence in the renovation market. Providing access to financing remains a challenge for private-driven OSSs, which to attract more customers resort to value additions to their service, which might affect their viability. The study provides valuable information and insights about OSSs in operation that could be useful to stakeholders that are active in the renovation market or interested to enter it

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  • 14.
    Pardalis, Georgios
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Public versus private one-stop-shops for energy renovations of residential buildings in the EU2021In: eceee 2021 Summer Study on Energy Efficiency: A New Reality?, European Council for an Energy Efficient Economy (ECEEE), 2021, p. 585-594Conference paper (Refereed)
    Abstract [en]

    The current rate of residential building renovations in Europe is inadequate and attributable to the lack of integrated solutions in the market supported by appropriate business models. One-stop-shop (OSS) offers an innovative business approach, and it is acknowledged by the European Commission, in the Directive 2018/844/EU, as a transparent advisory and facilitating tool for the establishment of services relevant to energy efficiency renovations for buildings. This paper evaluates two different delivery mechanisms of OSS, namely public-driven and private-driven, using six examples of OSSs business models currently operating in five European countries. The study is based on document and records-based research, and the analysis of data is done through a standardized blank profile for each OSS including parameters based on the deliberations of Osterwalder and Pigneur's business model canvas.

    A comparative analysis of the models has been conducted to identify repetitive patterns, commonalities, and differences between them. The study has shown that the examined OSSs are still in a developing stage, struggling to achieve enough scale, which indicates the need to lower their costs, reorganize their models and streamline the value chain to become attractive to their targeted customer segments. Public-driven OSSs appear to be, for the nonce, better positioned in the market and their reliance on public money allows them to achieve some expansion of their activities, even if this cannot be considered a sustainable business solution in the long run. Private-driven OSSs need to work harder to strengthen their position in the market and increase their attractivity. Towards that direction, the contribution of policy interventions and re-adjustment of existing financing mechanisms could be further examined.

  • 15.
    Pardalis, Georgios
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Swedish construction MSEs: simply renovators or renovation service innovators?2020In: Building Research & Information, ISSN 0961-3218, E-ISSN 1466-4321, Vol. 48, no 1, p. 67-83Article in journal (Refereed)
    Abstract [en]

    To address the renovation needs of detached house stock in Sweden, micro and small-sized enterprises (MSEs), a subgroup of small and medium-sized enterprises, are expected to introduce more comprehensive house renovation solutions. One-stop-shop (OSS) is an innovative Product-Service System model that can enable MSEs to offer comprehensive renovation packages instead of existing fragmented solutions. We have applied a conceptual framework for innovation adoption in organizations and conducted an interview of 21 construction MSEs in three different geographical areas in Sweden to examine their perceptions and preparedness to adopt the OSS business concept. Findings showed that the examined MSEs are positive towards OSS as it could address the needs for the comprehensive renovation of detached houses. However, presently, are not prepared to take the coordinator’s role in such a concept mainly due to the perceived business risks, the lack of flexibility to organizational restructuring, and lack of resources and management competency to coordinate multiple tasks and actors. Those organizations lacked awareness of existing policy support and access to funding mechanisms to try new business models. As a solution, they proposed an external coordinator to be the provider of OSS, on the trial phase, whose role and characteristics need to be further examined.

  • 16.
    Pardalis, Georgios
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Bravo, Giangiacomo
    Linnaeus University, Faculty of Social Sciences, Department of Social Studies.
    Future Energy-Related House Renovations in Sweden: One-Stop-Shop as a Shortcut to the Decision-Making Journey2021In: Emerging Research in Sustainable Energy and Buildings for a Low-Carbon Future / [ed] Robert J.; Howlett John R.; Littlewood, Lakhmi C. Jain, Singapore: Springer, 2021, 1, p. 37-52Chapter in book (Refereed)
    Abstract [en]

    Based on an online survey, this paper analyzes the attitude of detached house owners in Sweden toward future renovations and their perception over a one-stop-shop (OSS) service for deep renovation of these dwellings. With the aid of a house owners’ renovation decision-making journey for renovation, personal and contextual variables have been analyzed to identify those house owners having renovation plans in the near future, what they are going to renovate, and which needs to lead them to that decision. Furthermore, we examine if there is an interest in OSS concept and the factors affecting positively or negatively the choice for such a concept. Results suggest that deep renovation is not yet prioritized. The priority for house owners is to change specific components of their dwelling and follow a step-wise approach. Aesthetic renovations are high on the agenda, with some structural and energy-related renovations following them. House owners between 29 and 49 years of age are those mostly interested in more comprehensive renovations. The OSS concept appears to be interesting to a number of house owners capable to verify a business potential. House owners up to the age of 45 years, with dwellings built from 1960 and above and with environmental awareness, are the market segment that can act as early adopters of the OSS concept. When it comes to the decision-making journey for renovations, house owners’ future plans, and the factors affecting their choice for an OSS provider, we can claim that OSS can act as a guide for house owners from the early stages of their decision-making journey and provide them with a shortcut that will make this journey more secure, while triggering renovation decision of greater extent. In terms of financing, incentives related to energy performance are also suggested as means that could boost greater interest for more comprehensive renovations.

  • 17.
    Pardalis, Georgios
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Jalilzadehazhari, Elaheh
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Renovation of detached houses in Sweden: Can one-stop-shop provide a solution?2019In: Presented at: International Conference on Sustainability in Energy and Buildings SEB-19, 2019, article id seb19s-006Conference paper (Refereed)
    Abstract [en]

    Based on an online survey, this paper analyzes the attitude of house owners in Sweden towards future renovations and one-stop-shop (OSS) services for deep renovation of detached houses. With the aid of a house owners’ decision-making journey for renovation, personal and contextual variables have been analyzed to identify those house owners having renovation plans in the near future, what they are going to renovate, and which needs led them to that decision. Furthermore, we examine if there is an interest in OSS concept. Results suggest that deep renovation is not yet prioritized. The priority for house owners is to change specific components of their dwelling and follow a step-wise approach. Aesthetic renovations are high on the agenda, with some structural and energy-related renovations following them. House owners between 29- 49 years of age could be the customer segment to target for deep renovations. The OSS concept seems interesting to a number of house owners, who can form an early adopters segment that could develop the market. There is a need for a cost-efficient OSS concept for deep renovations, ensuring the quality of work, and the optimization of financial products and tax incentives to accelerate the deep renovation market.

  • 18.
    Pardalis, Georgios
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Rupar-Gadd, Katarina
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Kundresa för One-Stop-Shop2022Report (Other academic)
    Abstract [sv]

    Den här guiden är en av tre guider som publiceras inom detta projektoch bygger på tidigare forskning, med syftet att utveckla kunskap och metoder för aktörer på efterfråge- och utbudssidan på marknaden för energieffektiv renovering av villor. Guiden ger en översikt över den kundresa som villaägare följer i sitt beslut att genomföra eller inte att energirenovera sin villa, och hur One-stop-shop (OSS) konceptet kan bidra med renoveringsresan.

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  • 19.
    Pardalis, Georgios
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    One-stop-shop as an innovation, and construction SMEs: a Swedish perspective2019In: Innovative Solutions for Energy Transitions: Proceedings of the 10th International Conference on Applied Energy (ICAE2018) / [ed] Prof. J.Yanab, Prof. H.Yangc, Dr. H.Lid, Dr. X.Chene, Elsevier, 2019, Vol. 158, p. 2737-2743Conference paper (Refereed)
    Abstract [en]

    This paper examines the views of construction SMEs in Sweden regarding innovations, in particular the one-stop-shop business concept,and its adoption for renovation of detached house. The investigation is based on interviews with 10 construction SMEs and by applying aconceptual framework for organizational innovation adoption. The results suggest that, even though the one-stop-shop businessconcept is perceived as a means for growth, at present, construction SMEs in Sweden are unlikely to adopt it at present. This lackof interest is mostly related to the perceived complexity of this model and the underlying risks and uncertainties. That complexity isseen as a preventing factor as it puts at stake their current business. The interviewees proposed that there should be an entrepreneur to coordinate the actors involved in the renovation process, whose role can be further studied.

  • 20.
    Pardalis, Georgios
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    One-stop-shop as an innovation, and preparedness to adopt it: a study on house renovation stakeholders in Sweden2018In: Advanced Building Skins: 1-2 October 2018, Bern, Switzerland, Wilen (Sarnen): Advanced Building Skins. ABS, 2018, p. 567-569Conference paper (Other academic)
    Abstract [en]

    This study examines the views of stakeholders involved in house renovations regarding the one-stop-shop business concept innovation, and assesses their level of preparedness to adopt such a concept in order to enter the promising market of detached house renovations. The investigation is based on 25 interviews with construction SMEs owners, real estate agents and loan consultants, and on a conceptual framework for organizational innovation adoption. The results suggest that for the nonce, none of the examined stakeholdersis likely to adopt a one-stop-shop business model to enter the market of detached house renovations, even though this concept is seen as one with great potential. This mostly happens due to their individual characteristics, the complexity of one-stop-shop model related to their way of doing business and the uncertainties deriving from the adoption of such a model. Furthermore, the participation of an entrepreneur is proposed, who would coordinate all the different actors involved in the renovation process, and whose role can be further examined.

  • 21.
    Pardalis, Georgios
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Talmar, Madis
    Eindhoven University of Technology, Netherlands.
    Keskin, Duygu
    Eindhoven University of Technology, Netherlands.
    To be or not to be: The organizational conditions for launching one-stop-shops for energy-related renovations2021In: Energy Policy, ISSN 0301-4215, E-ISSN 1873-6777, Vol. 159, article id 112629Article in journal (Refereed)
    Abstract [en]

    Residential energy-related renovations have a high potential to reduce emissions. However, organizing such renovation is riddled with high transaction costs. In response, scholars and policymakers (e.g., European Commission) have advocated the One-Stop-Shop (OSS) concept to simplify house owners’ access to complex renovation solutions, but adoption of the concept remains slow. So far, research has focused on the positive impact of OSS at the end customer interface, paying less attention to the governance challenges among supply-side actors. We perform abductive research that combines insights from 45 supply-side actor interviews with transaction cost economics and resource-based theory toward developing a conceptual framework that outlines 15 organizational conditions for supply-side actors’ uptake of the OSS model. Empirically, we find that supply-side organizations are, at this point, reluctant to take up governance of the OSS model. The reported reasons for this vary between different classes of organizations but overall align well with the organizational conditions outlined in transaction cost economics and resource-based theory. We propose policy interventions to tackle these shortcomings and to structurally support the supply-side of the renovation market in developing the relevant conditions for OSS uptake. 

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  • 22.
    Sula, Migena
    et al.
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Mainali, Brijesh
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Rupar-Gadd, Katarina
    Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
    Pardalis, Georgios
    Lund University, Sweden.
    Adopting Space Sufficiency Interventions as a Means for Accelerating Energy Renovation: Swedish Homeowners’ Perspective2023In: Proceedings of the International Conference “Sustainable Built Environment and Urban Transition”, Linnaeus University Press , 2023Conference paper (Refereed)
    Abstract [en]

    Residential energy consumption remains a significant driver of CO2 emissions in European buildings, demanding urgent action in the face of the climate crisis. While prevailing efforts have predominantly concentrated on enhancing energy efficiency and integrating renewable sources, addressing the climate urgency and resource constraints necessitates a paradigm shift towards sufficiency principles. Swedish statistics on Single-Family Houses (SFH) show that more than a third of households inhabit oversized spaces in aging buildings needing renovation. Sufficiency-oriented renovation strategies—optimizing, or reducing living areas per capita— present a promising avenue to achieve substantial energy reductions. This approach also opens the potential for space rentals, yielding combined energy and space efficiency advantages. In addition, the literature highlights reduced maintenance costs and potential urban housing crisis mitigation. However, practical implementation faces multiple obstacles.This paper investigates SFH owners' attitudes towards space-sufficiency interventions, focusing on living size preferences and identifying barriers and opportunities for sustainable housing. Through focus group sessions with SFH owners in November-December 2022, qualitative content analysis revealed that reducing living space per capita faces multifaceted challenges, despite potential benefits.These challenges encompass not only personal and psychological considerations but extend to economic, infrastructural, and policy barriers, including issues such as the potential breach of privacy, disruptions due to noise, dilemmas related to ownership and independency, disruptions to work-life dynamics, inadequate familiarity with sufficiency principles, and uncertainty imposed by space constraints. Strategic integration of sufficiency principles into energy-renovation policy alternatives necessitates a holistic approach that addresses these barriers, and some form of incentives may be needed to catalyze the adoption of sufficiency principles effectively.

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