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  • 1.
    Gustavsson, Leif
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Mahapatra, Krushna
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Nair, Gireesh
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Implementering av energieffektiviseringsåtgärder i befintlig bebyggelse: Report prepared for the Swedish Energy Agency2010Report (Other academic)
  • 2.
    Gustavsson, Leif
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Mahapatra, Krushna
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Nair, Gireesh
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Implementing energy efficiency measures in existing Swedish building stock2008In: World Sustainable Energy Days 2008, 5-7 March 2008, Wels, Austria, 2008Conference paper (Refereed)
    Abstract [en]

    There is a large potential for improving energy efficiency in the existing Swedish building stock. However, how successful the implementation of the efficiency measures will be, depends on economical and technical factors as well as on the attitudes and perceptions of the relevant actors. In this paper we use Rogers’ diffusion of innovation theory to analyze various factors affecting implementation of energy efficiency measures in the Swedish detached houses and apartment buildings. Results of recent Swedish household surveys concerning adoption of heating systems showed that majority of the respondents were satisfied with their heating systems and did not intend to install a new one. Economic aspects and functional reliability were important factors in the choice of heating systems, while installers/vendors were the most important sources of information on heating system. We discuss upcoming empirical studies on implementation of other energy efficiency measures, e.g. energy efficient windows and additional insulation, including that of heating systems, in detached houses and apartment buildings.

  • 3.
    Mahapatra, Krushna
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Dodoo, Ambrose
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Gustavsson, Leif
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Nair, Gireesh
    Department of Engineering and Sustainable Development, Mid Sweden University.
    System analysis of and stakeholders’ perceptions on end-use energy efficiency measures for existing Swedish multi-family buildings2012In: COBEE 12, International Conference on Building Energy and Environment. Boulder, Colorado, USA, August 1-4, 2012Conference paper (Refereed)
    Abstract [en]

    In Sweden, there is opportunity to implement energy efficiency measures in about one million existing apartments that are likely to be refurbished within the next 20 years. System analyses of installation of energy efficient windows, and increased insulation in attic and in exterior walls for an existing multi-story building showed that the primary energy savings for the measures depend on the energy supply system. Energy efficiency potential was higher with installation of efficient windows than improved attic insulation. Responses of 673 chairpersons of co-operative hosing associations to a mail-in survey in 2010 also showed that greater proportion of respondents perceived that energy efficient windows had advantages over insulation improvements. However, majority had no intention to implement such measures during next 10 years and economic factors guide their decisions. Lack of expertise to assess the benefits of energy efficiency measures was the most cited hindrances to energy efficiency investments.

  • 4.
    Mahapatra, Krushna
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Nair, Gireesh
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Potential target group for the introduction of full service energy efficient renovation in Swedish single-family houses2010In: SB10, Sustainable Community, Espoo, Finland, September 22-24, 2010, 2010Conference paper (Refereed)
  • 5.
    Mahapatra, Krushna
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Nair, Gireesh
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Swedish homeowners’ perceptions of innovative heating systems – results of three surveys2009In: ECEEE 2009 Summer Study, 1-6 June 2009, La Colle sur Loup, Côte d'Azur, France, European Council for an Energy Efficient Economy (ECEEE), 2009Conference paper (Refereed)
    Abstract [en]

    Replacing oil and electric heating systems with innovative heating systems (IHSs) such as bedrock heat pumps, district heating system, and pellet boilers will significantly reduce greenhouse gas emission from Swedish detached houses. However, realizing this potential depends on homeowners’ adoption decision, which is influenced by their need, awareness and perception of the advantages associated with the IHSs. In this context, we conducted mail-in questionnaire surveys of 1,500 Swedish homeowners, selected through stratified random sampling method, in Fall 2004, Spring 2007, and Summer 2008. A response rate of 42%, 48% and 37% was obtained in the 2004, 2007 and 2008 surveys, respectively. One of the aims of the series of surveys was to find out if external factors such as provision of investment subsidies and mass media discussion of climate change issues had influenced homeowners awareness and perception of the advantages associated with the IHSs. Results showed that there was no appreciable change in homeowners’ perceptions between the years surveyed. They consistently gave higher priority to economic factors over environmental factors in their decision to install a new heating system. Heat pumps were best perceived with respect to the annual energy cost of heating, environmental benignity, increased market value of the house, and low greenhouse gas emissions. Respondents felt that pellet boilers had the lowest investment cost, while district heating system had the perceived advantage of functional reliability.

  • 6.
    Mahapatra, Krushna
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Nair, Gireesh
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Energy advice service as perceived by Swedish homeowners2011In: International Journal of Consumer Studies, ISSN 1470-6423, E-ISSN 1470-6431, Vol. 35, no 1, p. 104-111Article in journal (Refereed)
    Abstract [en]

    External actors can influence potential adopters to adopt energy efficiency measures. In Sweden municipality energy advisers are one such actor group who provides energy advice and information to the end users. The success of energy advice service for improvement of energy efficiency of detached houses depends on homeowners' perception towards it. In this context, we conducted a national survey of about 3000 owners of detached houses through stratified random sampling method in the summer of 2008. We found that majority of owners of detached houses consider energy advisers as an important source of information. Furthermore, many homeowners who contacted energy advisers for advice had implemented the suggestions. However, only a few homeowners had contacted an energy adviser. Our findings suggest that it is beneficial to continue the energy advice service, but more efforts are needed to increase homeowners' awareness of and satisfaction with such services.

  • 7.
    Mahapatra, Krushna
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Nair, Gireesh
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Perceptional and socio-economic factors in adoption of low energy houses2009In: International Scientific Conference on Energy systems with IT, March 11-12, in connection with 'Energitiget 2009', Stockholm, Sweden, 2009Conference paper (Refereed)
    Abstract [en]

    Diffusion of low energy houses reduces greenhouse emission from residential sector. However, adoption of such houses depends on the perception of the potential buyers. In this paper we have analyzed Swedish homeowners’ perception of low energy houses. Data was collected in 2008 from a mail-in questionnaire survey of about 3000 owners of detached houses. Results showed that about 39% of respondents, especially young, educated or whose household income was high, would consider buying a low energy house. Majority of the respondents agreed that a low energy house in comparison to a conventional house has lower operating energy cost, but higher investment cost. Majority thought that low energy houses do not have lower resale value, lower aesthetic appearance, or greater operational difficulty.

  • 8.
    Mahapatra, Krushna
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Nair, Gireesh
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Policy instruments to promote energy efficiency in the building sector: Indian and Swedish experiences2008In: 14th Annual International Sustainable Development Research Conference, 21-23 September, New Delhi, India, 2008Conference paper (Refereed)
    Abstract [en]

    Energy efficiency measures in buildings are widely regarded as cost effective options to mitigate climate change. However, policy instruments are needed to improve the diffusion of such measures. The policy mix may be country-specific. Here, we compare and contrast the various policy instruments designed to enhance energy efficiency in the building sector in India and Sweden. The objective is to explore if the experiences of Sweden that have promoted energy efficiency in buildings for decades could be useful for India, where energy demand is forecasted to strongly increase. India and Sweden are very different, for example, in terms of development, size, priorities, population, and climatic conditions. In Sweden, policy initiatives to reduce energy use in buildings date back to the 1970s and the government is committed to significantly reduce energy use in buildings. In India, the interest in energy efficiency improvements in buildings is a recent phenomenon. The country introduced an energy conservation building code in 2007. This analysis shows that policy instruments are more prevalent in Sweden than in India where regulatory instruments are particularly lacking. Hence, Swedish buildings are more energy efficient than those in India. The Swedish experience could be useful for devising programs and implementing policy instruments to improve energy efficiency of Indian buildings.

  • 9.
    Mahapatra, Krushna
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Nair, Gireesh
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Swedish energy advisers' perceptions regarding and suggestions for fulfilling homeowner expectations2011In: Energy Policy, ISSN 0301-4215, E-ISSN 1873-6777, Vol. 39, no 7, p. 4264-4273Article in journal (Refereed)
    Abstract [en]

    Municipality energy advice services were re-introduced in Sweden in 1998 as a way of advising end-users, mainly owners of detached houses, on energy issues. In this paper, we investigate Swedish energy advisers' perceptions of homeowners' awareness of the energy advice service and their perceived ability to fulfil homeowners' expectations. Our study is based on a mail-in questionnaire survey conducted in 2009 and distributed to municipality energy advisers in all municipalities in Sweden. About 66% of the energy advisers responded. The results show that 43% of the energy advisers thought that fewer than 50% of the homeowners were aware of the service and that mass media advertisements and presentations at different organisations could improve homeowner awareness. Energy adviser attitudes, job satisfaction, and the perception that the advisers possessed up-to-date and good knowledge and sufficient financial resources to execute their duties had a significant influence on their perceived ability to fulfil homeowner expectations. Increased training in technical aspects of energy measures and increased financial support were the two measures most widely suggested as a means to improve energy advisers' performance.

  • 10.
    Mahapatra, Krushna
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Nair, Gireesh
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    The role of energy advisers on adoption of energy measures in detached houses2009In: International Scientific Conference on Energy systems with IT, 11-12 March, in connection with the ‘Energitinget 2009’, Stockholm, Sweden, 2009Conference paper (Refereed)
  • 11.
    Nair, Gireesh
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Mahapatra, Krushna
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Adoption of energy efficiency measures in swedish detatched houses2009In: International Scientific Conference on Energy systems with IT, March 11-12, in connection with 'Energitiget 2009', Stockholm, Sweden, 2009Conference paper (Refereed)
    Abstract [en]

    The paper focuses on Swedish homeowners’ need for and perceptions about adopting building envelop energy efficiency measures such as improved windows and attic and wall insulation. The results of a questionnaire surveying 3000 randomly selected homeowners during the summer of 2008 revealed that about 70-90% of the respondents had no intention of implementing such a measure over the next 10 years. The main reasons for non-adoption were that homeowners were satisfied with the physical condition, thermal performance, and aesthetics of their existing installations. A greater proportion of respondents perceived that improving attic insulation has more advantages than other measures, but windows were more likely to be installed than attic insulation was to be improved. Respondents gave high priority to economic factors in deciding on an energy efficiency measure, while environmental aspects were given lower priority. Hence, economic incentives could be useful in promoting the adoption of building envelope energy efficiency measures. Interpersonal sources, construction companies/installers, and energy advisers were important sources of information for homeowners as they planned to install energy efficiency measures.

  • 12.
    Nair, Gireesh
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Mahapatra, Krushna
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Barriers to implement energy efficiency investment measures in Swedish co-operative apartment buildings2011In: World Renewable Energy Congress 2011, Linköping, Sweden, May 8-11, Linköping University Electronic Press, 2011Conference paper (Refereed)
  • 13.
    Nair, Gireesh
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Mahapatra, Krushna
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Factors influencing energy efficiency investments in existing Swedish residential buildings2010In: Energy Policy, ISSN 0301-4215, E-ISSN 1873-6777, Vol. 38, no 6, p. 2956-2963Article in journal (Refereed)
    Abstract [en]

    We used the data from a survey conducted in 2008 of 3,000 owners of detached houses to analyse the factors that influence the adoption of investment measures to improve the energy efficiency of their buildings. For the majority of Swedish homeowners, it was important to reduce their household energy use, and most of them undertook no-cost measures as compared to investment measures. Personal attributes such as income, education, age and contextual factors, including age of the house, thermal discomfort, past investment, and perceived energy cost, influence homeowners’ preference for a particular type of energy efficiency measure. The implications for promoting the implementation of energy efficiency investment measures are discussed.

  • 14.
    Nair, Gireesh
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Mahapatra, Krushna
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Owners perception on the adoption of building envelope energy efficiency measures in Swedish detached houses2010In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 87, no 7, p. 2411-2419Article in journal (Refereed)
    Abstract [en]

    The paper focuses on Swedish homeowners’ need for and perceptions about adopting building envelop energy efficiency measures. The paper is based on a questionnaire survey of 3059 homeowners (response rate of 36%) selected by stratified random sampling during the summer of 2008. The results showed that 70–90% of the respondents had no intention of adopting such a measure over the next 10 years. The main reasons for non-adoption were that homeowners were satisfied with the physical condition, thermal performance, and aesthetics of their existing building envelope components. A greater proportion of respondents perceived that improved attic insulation has more advantages than energy efficient windows and improved wall insulation, but windows were more likely to be installed than improved attic insulation. Respondents gave high priority to economic factors in deciding on an energy efficiency measure. Interpersonal sources, construction companies, installers, and energy advisers were important sources of information for homeowners as they planned to adopt building envelope energy efficiency measures. Policy measures to facilitate the rate of adoption of energy efficient building envelope measures are discussed.

  • 15.
    Nair, Gireesh
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Mahapatra, Krushna
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Programme of activities: Will it break the ice for residential sector CDM projects?2008In: 14th Annual international sustainable development research conference, New Delhi, India, 2008Conference paper (Other academic)
  • 16.
    Nair, Gireesh
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Hemström, Kerstin
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Mahapatra, Krushna
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Role of sellers/installers in the diffusion of energy efficient windows in Swedish detached houses2010In: SB10, Sustainable Community, Espoo, Finland, September 22-24, 2010, 2010Conference paper (Refereed)
  • 17.
    Nair, Gireesh
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Mahapatra, Krushna
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Energy advice service as a policy instrument to promote energy efficiency in residential sector: Perception of end-users and service providers2011In: SB11, World sustainable building conference, Helsinki, Finland. October 18-21, 2011, 2011Conference paper (Refereed)
  • 18.
    Nair, Gireesh
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Mahapatra, Krushna
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Gustavsson, Leif
    Linnaeus University, Faculty of Science and Engineering, School of Engineering.
    Implementation of energy efficient windows in Swedish single-family houses2012In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 89, no 1, p. 329-338Article in journal (Refereed)
    Abstract [en]

    A questionnaire survey of 1010 homeowners in Jämtland and Västernorrland, which are two counties in central Sweden, was conducted to understand the factors influencing their decision to install energy-efficient windows. We complemented this survey with an interview of 12 window sellers/installers in the county Jämtland. The annual energy cost reduction, age, and condition of the windows were the most important reasons for the window replacement decision. Approximately 80% of the respondents replaced their windows with energy-efficient windows with U-value of 1.2 W/m2 K. Condensation problems, perceived higher prices, and lack of awareness about windows with lower U-values were important reasons for non-adoption of more energy-efficient windows. Window sellers/installers have a strong influence on homeowners’ window selection that was indicated by the 97% of homeowners who bought the windows that were recommended to them. Sellers/installers revealed that they did not recommend windows with U-value of less than 1.2 W/m2 K because they thought that investing in such windows was not economical and because windows with U-value less than 1.2 W/m2 K could cause water condensation on the external surface of window pane.

  • 19.
    Nair, Gireesh
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Mahapatra, Krushna
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Influence of external actors in Swedish homeowners’ adoption of energy efficient windows2011In: World Renewable Energy Congress 2011, Linköping, Sweden, May 8-11, Linköping University Electronic Press, 2011Conference paper (Refereed)
  • 20.
    Nair, Gireesh
    et al.
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Mahapatra, Krushna
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Gustavsson, Leif
    Mittuniversitetet, Institutionen för teknik och hållbar utveckling.
    Policy instruments to promote building energy efficiency from an end-user point of view2011In: ECEEE Summer study, Belambra Presqu'île de Giens, France, 6–11 June, European Council for an Energy Efficient Economy (ECEEE), 2011Conference paper (Refereed)
1 - 20 of 20
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