Energy Efficiency in Seasonal Homes: A Study on the Occupancy, Energy Use, and Renovation of Second Homes in Sweden

Author:

Mjörnell Kristina12ORCID

Affiliation:

1. Research Institutes of Sweden, Sven Hultins Plats 5, 412 58 Gothenburg, Sweden

2. Division of Building Physics, LTH, Lund University, 221 00 Lund, Sweden

Abstract

The escalating utilisation of second homes has led to an extension in heating periods and, to a certain degree, renovations to elevate the standard, resulting in augmented energy and resource consumption. A comprehensive survey was conducted in Sweden, examining user patterns across different seasons, heating systems, and implemented energy efficiency measures. The results indicate that second homes are occupied for extended periods during the summer season and intermittently throughout the year. Over half of the second homes are heated even when unoccupied, with 12% maintaining a temperature above 16 °C. The predominant heating method is direct electricity (32.2%), followed by heat pumps (29.5%) and stoves (17.5%). A variety of renovations are undertaken, primarily to enhance the standard and technical performance, but also to implement energy efficiency measures such as window replacement, additional insulation, or heat pump installation. Based on the reported user and heating patterns, and the energy renovations carried out, the potential energy savings with different energy renovation strategies were estimated for the Swedish second home stock. The results show that though lowering the temperature when a second home is unoccupied emerges as the most efficient measure, both in terms of cost-effectiveness and climate impact, it needs to be complemented with intermittent heating or dehumidification to ensure that the relative humidity is below critical levels, to avoid the risk of damages caused by, for example, mould growth. Installing a heat pump is the second most energy- and cost-effective measure and has the advantage that the indoor temperature can be maintained at rather high levels.

Funder

Swedish Energy Agency

Publisher

MDPI AG

Reference38 articles.

1. (2024, May 10). EU Fit for 55: EU’s Target of Reducing Net Greenhouse Gas Emissions by at Least 55% by 2030. The Proposed Package Aims to Bring EU Legislation in Line with the 2030 Goal. Available online: https://www.consilium.europa.eu/en/policies/green-deal/fit-for-55/.

2. (2024, May 10). Boverket 2020. Underlag till Den Tredje Nationella Strategin för Energieffektiviserande Renovering. Available online: https://www.boverket.se/sv/om-boverket/publicerat-av-boverket/publikationer/2019/underlag-till-den-tredje-nationella-strategin-for-energieffektiviserande-renovering/.

3. (2024, May 10). COM 2021. Proposal for a DIRECTIVE of the EUROPEAN PARLIAMENT and of the COUNCIL on the Energy Performance of Buildings. Available online: www.eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:52021PC0802.

4. (2024, May 10). Boverket 2023. Byggnader Som Inte Behöver Energideklareras—Energideklaration—Boverket. Buildings for Which Energy Declaration Is Not Needed. Swedish Board of Housing Building and Planning. Available online: https://www.boverket.se/sv/energideklaration/energideklaration/dessa-byggnader-behover-inte-energideklareras/.

5. (2024, May 10). Energy Statistics for Dwellings with No Registered Permanent Resident (Holiday Homes) 2011; Report ES 2012:03; ISBN 1654-7543. Available online: https://www.energimyndigheten.se/globalassets/statistik/officiell-statistik/statistikprodukter/energistatistik-for-fritidshus/energistatistik-for-fritidshus-2011.pdf.

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