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Nair, Gireesh
Publications (10 of 20) Show all publications
Nair, G., Mahapatra, K. & Gustavsson, L. (2012). Implementation of energy efficient windows in Swedish single-family houses. Applied Energy, 89(1), 329-338
Open this publication in new window or tab >>Implementation of energy efficient windows in Swedish single-family houses
2012 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 89, no 1, p. 329-338Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
Elsevier, 2012
National Category
Environmental Sciences
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-15704 (URN)10.1016/j.apenergy.2011.07.040 (DOI)2-s2.0-80053294916 (Scopus ID)
Available from: 2011-08-25 Created: 2011-11-08 Last updated: 2018-05-17Bibliographically approved
Mahapatra, K., Dodoo, A., Gustavsson, L. & Nair, G. (2012). System analysis of and stakeholders’ perceptions on end-use energy efficiency measures for existing Swedish multi-family buildings. In: COBEE 12, International Conference on Building Energy and Environment. Boulder, Colorado, USA, August 1-4: . Paper presented at The 2nd International Conference on Building Energy and Environment.
Open this publication in new window or tab >>System analysis of and stakeholders’ perceptions on end-use energy efficiency measures for existing Swedish multi-family buildings
2012 (English)In: COBEE 12, International Conference on Building Energy and Environment. Boulder, Colorado, USA, August 1-4, 2012Conference paper, Oral presentation with published abstract (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.

Keywords
Building Envelop, Energy Efficiency Retrofit, Primary Energy Savings, Perception, Sweden
National Category
Other Civil Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-18733 (URN)
Conference
The 2nd International Conference on Building Energy and Environment
Available from: 2012-05-21 Created: 2012-05-21 Last updated: 2018-05-17Bibliographically approved
Nair, G., Gustavsson, L. & Mahapatra, K. (2011). Barriers to implement energy efficiency investment measures in Swedish co-operative apartment buildings. In: World Renewable Energy Congress 2011, Linköping, Sweden, May 8-11: . Paper presented at World Renewable Energy Congress 2011, Linköping, Sweden, May 8-11. Linköping University Electronic Press
Open this publication in new window or tab >>Barriers to implement energy efficiency investment measures in Swedish co-operative apartment buildings
2011 (English)In: World Renewable Energy Congress 2011, Linköping, Sweden, May 8-11, Linköping University Electronic Press, 2011Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Linköping University Electronic Press, 2011
National Category
Other Environmental Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-15702 (URN)
Conference
World Renewable Energy Congress 2011, Linköping, Sweden, May 8-11
Available from: 2011-02-18 Created: 2011-11-08 Last updated: 2018-05-17Bibliographically approved
Nair, G., Mahapatra, K. & Gustavsson, L. (2011). Energy advice service as a policy instrument to promote energy efficiency in residential sector: Perception of end-users and service providers. In: SB11, World sustainable building conference, Helsinki, Finland. October 18-21, 2011. Paper presented at SB11, World sustainable building conference, Helsinki, Finland. October 18-21, 2011.
Open this publication in new window or tab >>Energy advice service as a policy instrument to promote energy efficiency in residential sector: Perception of end-users and service providers
2011 (English)In: SB11, World sustainable building conference, Helsinki, Finland. October 18-21, 2011, 2011Conference paper, Published paper (Refereed)
National Category
Other Environmental Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-15707 (URN)
Conference
SB11, World sustainable building conference, Helsinki, Finland. October 18-21, 2011
Available from: 2011-08-25 Created: 2011-11-08 Last updated: 2018-05-17Bibliographically approved
Mahapatra, K., Nair, G. & Gustavsson, L. (2011). Energy advice service as perceived by Swedish homeowners. International Journal of Consumer Studies, 35(1), 104-111
Open this publication in new window or tab >>Energy advice service as perceived by Swedish homeowners
2011 (English)In: International Journal of Consumer Studies, ISSN 1470-6423, E-ISSN 1470-6431, Vol. 35, no 1, p. 104-111Article in journal (Refereed) Published
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.

Keywords
Homeowner, perception, energy adviser, energy efficiency, Sweden
National Category
Other Environmental Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-15697 (URN)10.1111/j.1470-6431.2010.00924.x (DOI)000285881400013 ()
Available from: 2010-08-16 Created: 2011-11-08 Last updated: 2018-05-17Bibliographically approved
Nair, G., Mahapatra, K. & Gustavsson, L. (2011). Influence of external actors in Swedish homeowners’ adoption of energy efficient windows. In: World Renewable Energy Congress 2011, Linköping, Sweden, May 8-11: . Paper presented at World Renewable Energy Congress 2011, Linköping, Sweden, May 8-11. Linköping University Electronic Press
Open this publication in new window or tab >>Influence of external actors in Swedish homeowners’ adoption of energy efficient windows
2011 (English)In: World Renewable Energy Congress 2011, Linköping, Sweden, May 8-11, Linköping University Electronic Press, 2011Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Linköping University Electronic Press, 2011
National Category
Other Environmental Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-15705 (URN)
Conference
World Renewable Energy Congress 2011, Linköping, Sweden, May 8-11
Available from: 2011-02-18 Created: 2011-11-08 Last updated: 2018-05-17Bibliographically approved
Nair, G., Mahapatra, K. & Gustavsson, L. (2011). Policy instruments to promote building energy efficiency from an end-user point of view. In: ECEEE Summer study, Belambra Presqu'île de Giens, France, 6–11 June: . Paper presented at ECEEE Summer study, Belambra Presqu'île de Giens, France, 6–11 June. European Council for an Energy Efficient Economy (ECEEE)
Open this publication in new window or tab >>Policy instruments to promote building energy efficiency from an end-user point of view
2011 (English)In: ECEEE Summer study, Belambra Presqu'île de Giens, France, 6–11 June, European Council for an Energy Efficient Economy (ECEEE), 2011Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
European Council for an Energy Efficient Economy (ECEEE), 2011
National Category
Other Environmental Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-15706 (URN)
Conference
ECEEE Summer study, Belambra Presqu'île de Giens, France, 6–11 June
Available from: 2011-03-31 Created: 2011-11-08 Last updated: 2018-05-17Bibliographically approved
Mahapatra, K., Nair, G. & Gustavsson, L. (2011). Swedish energy advisers' perceptions regarding and suggestions for fulfilling homeowner expectations. Energy Policy, 39(7), 4264-4273
Open this publication in new window or tab >>Swedish energy advisers' perceptions regarding and suggestions for fulfilling homeowner expectations
2011 (English)In: Energy Policy, ISSN 0301-4215, E-ISSN 1873-6777, Vol. 39, no 7, p. 4264-4273Article in journal (Refereed) Published
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.

Keywords
Energy adviser, Perception, Survey
National Category
Environmental Biotechnology
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-15693 (URN)10.1016/j.enpol.2011.04.043 (DOI)000292620800040 ()79957648665 (Scopus ID)
Available from: 2011-05-30 Created: 2011-11-08 Last updated: 2018-05-17Bibliographically approved
Nair, G., Gustavsson, L. & Mahapatra, K. (2010). Factors influencing energy efficiency investments in existing Swedish residential buildings. Energy Policy, 38(6), 2956-2963
Open this publication in new window or tab >>Factors influencing energy efficiency investments in existing Swedish residential buildings
2010 (English)In: Energy Policy, ISSN 0301-4215, E-ISSN 1873-6777, Vol. 38, no 6, p. 2956-2963Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
Elsevier, 2010
Keywords
Building envelope measures, Energy efficiency investment measures, Homeowners
National Category
Other Environmental Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-15700 (URN)10.1016/j.enpol.2010.01.033 (DOI)000278055700047 ()77951297003 (Scopus ID)
Available from: 2010-03-02 Created: 2011-11-08 Last updated: 2018-05-17Bibliographically approved
Gustavsson, L., Mahapatra, K. & Nair, G. (2010). Implementering av energieffektiviseringsåtgärder i befintlig bebyggelse: Report prepared for the Swedish Energy Agency.
Open this publication in new window or tab >>Implementering av energieffektiviseringsåtgärder i befintlig bebyggelse: Report prepared for the Swedish Energy Agency
2010 (English)Report (Other academic)
Publisher
p. 31
National Category
Other Environmental Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-15631 (URN)
Available from: 2011-02-18 Created: 2011-11-08 Last updated: 2018-05-17Bibliographically approved

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