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Additional Dwelling Units: Can they finance energy renovation?
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. (Sustainable Built Environment)ORCID iD: 0000-0001-6818-4959
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. (Sustainable Built Environment)ORCID iD: 0000-0003-4405-1056
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. (Sustainable Built Environment)ORCID iD: 0000-0003-0189-474x
2022 (English)In: eceee 2022 Summer Study on energy efficiency: agents of change, European Council for an Energy Efficient Economy (ECEEE), 2022, European Council for an Energy Efficient Economy (ECEEE), 2022 , 2022, article id 8-296-22Conference paper, Published paper (Refereed)
Sustainable development
SDG 11: Make cities and human settlements inclusive, safe, resilient, and sustainable, SDG 13: Take urgent action to combat climate change and its impacts by regulating emissions and promoting developments in renewable energy, SDG 9: Build resilient infrastructure, promote inclusive and sustainable industrialization, and foster innovation, SDG 3: Ensure healthy lives and promote well-being for all at all ages, SDG 7: Ensure access to affordable, reliable, sustainable and modern energy for all
Abstract [en]

In Northern Europe, Single Family Housings (SFH) constitute a large share of the total building stock. In Sweden, more than 52% of the population lives in SFH. Most of these houses were built between 1960-80 and are currently needing renovation. Most of these houses are owned by older adults whose kids have moved away, and thus they live in housing over-dimensioned to their needs with a large share of energy consumption for space heating. Furthermore, these facilities are neither elderly-friendly nor energy-efficient, deeming major renovation.

 

This paper applies a case-study approach to explore options to better utilize and reduce the living area per capita through the generation of Additional Dwellings Unit (ADU) within the existing building stock owned by the elderly. The case study SFH owned by an elderly couple is located in Kronoberg Region, Sweden, and is a typical SFH built during the 1970s. We redesign and restructure the underused space to create an ADU that can be rented out, which in turn may economize the high investment costs of energy-efficient renovation. The energy efficiency renovation measures considered were improvement of the building's climate shell (envelope), extra insulation in the walls and attic, and better performance doors and windows. Energy simulations and life cycle cost assessment of the energy efficiency measures, and space redesign showed that it is possible to reduce energy use by 61% compared to the existing condition of the reference house and a payback time of 59% compared to the application of the energy measures alone. The proposed intervention is aligned with the aging in place strategy, tackling it from a space sufficiency perspective. The proposed intervention reduces the living space per resident by 40% and energy consumption per capita by 62% compared to just the energy renovation of the reference house while creating cash inflows that motivate the houseowner to uptake an energy renovation. The improved energy performance of the building may generate better indoor living conditions for a healthier life for the residents.

Place, publisher, year, edition, pages
European Council for an Energy Efficient Economy (ECEEE), 2022 , 2022. article id 8-296-22
Series
eceee 2022 Summer Study on energy efficiency, ISSN 1653-7025, E-ISSN 2001-7960 ; 2022
Keywords [en]
space heating, building design, housing refurbishment, detached houses, elderly-friendly, social innovation, design innovation
National Category
Building Technologies Energy Systems Environmental Analysis and Construction Information Technology
Research subject
Technology (byts ev till Engineering), Sustainable Built Environment
Identifiers
URN: urn:nbn:se:lnu:diva-116876ISBN: 9789198827002 (print)ISBN: 9789198827019 (electronic)OAI: oai:DiVA.org:lnu-116876DiVA, id: diva2:1704006
Conference
eceee 2022 Summer Study on energy efficiency: Agents of Change
Projects
Scaling up energy renovation through smart design and one-stop-shop business modelSustainable housing for strong communities (Stronghouse)
Funder
Knowledge Foundation, Hög 20Interreg North Sea Region, J-No 38-2-15-19Swedish Research Council Formas, 2019-00219Available from: 2022-10-17 Created: 2022-10-17 Last updated: 2023-04-18Bibliographically approved

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https://www.eceee.org/library/conference_proceedings/eceee_Summer_Studies/2022/8-innovations-in-products-systems-and-building-technologies/additional-dwelling-units-can-they-finance-energy-renovation/

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Sula, MigenaMahapatra, KrushnaMainali, Brijesh

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