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Methods for air tightness analysis for residential buildings in Nordic countries
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics. (Energigruppen ; Arcum)
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics. (Energigruppen ; Arcum)
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics. (Byggruppen)
2012 (English)In: Methods for air tightness analysis forresidential buildings in Nordic countries, Southampton: WIT Press, 2012, 311-322 p.Conference paper, Oral presentation only (Refereed)
Abstract [en]

Envelope air tightness is one factor that has impact on the energy performance ofbuildings. The goals of the directive 2010/31/EU, on energy performance ofbuildings, raise the importance of building energy performance analysis in theprocess. Measurements of air tightness can be useful both when evaluatingbuilding energy performance and developing new building techniques. The aimof this paper is to review and evaluate methods to measure air tightness in bothnew and existing residential buildings in Sweden, Norway and Finland, based onan international literature study and a survey. The methods are categorized basedon a number of criteria to determine their suitability in different situations.Advantages and disadvantages of the methods are discussed, as well ascommonly used methods in the three countries. The review shows that thestandard ISO 9972 is used for verification in all three countries, but alternativesexist that might be more suitable in certain situations. Simpler methods are usedin the building process to increase air tightness. To achieve a comparablemeasurement, both common methods and commonly defined units are needed.

Place, publisher, year, edition, pages
Southampton: WIT Press, 2012. 311-322 p.
Series
WIT Transactions on Ecology and the Environment, ISSN ISSN 1743-3541 ; 165
Keyword [en]
air tightness measurements, residential buildings, cold climate, energy use, building regulations
National Category
Building Technologies Energy Systems
Identifiers
URN: urn:nbn:se:umu:diva-59483ISBN: 978-1-84564-614-1 (print)OAI: oai:DiVA.org:umu-59483DiVA: diva2:556751
Conference
Eco-architecture IV - Harmonisation between Architecture and Nature
Projects
Increasing Energy Efficiency in Buildings (IEEB)
Funder
EU, European Research Council
Available from: 2012-10-16 Created: 2012-09-14 Last updated: 2016-05-20Bibliographically approved
In thesis
1. Achieving building energy performance: requirements and evaluation methods for residential buildings in Sweden, Norway, and Finland
Open this publication in new window or tab >>Achieving building energy performance: requirements and evaluation methods for residential buildings in Sweden, Norway, and Finland
2015 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Building energy performance has always been important in the cold climate of Sweden, Norway and Finland. To meet the goal that all new buildings should be nearly zero-energy buildings by 2020, set in the EU directive 2010/31/EU [1] on the energy performance of buildings (EPBD recast), the building sector in Europe now faces a transition towards buildings with improved energy performance. In such a transition, a discussion is needed about the objective of the improvement – why, or to what end, the building energy performance should be improved. The objective of improving building energy performance is often a political decision, but scientific research can contribute with knowledge on how the objectives can be achieved.

This thesis addresses how the indicators used in the requirements used to achieve building energy performance in Sweden, Norway, and Finland, and the methods used to evaluate these requirements, reflect building energy performance. It also addresses difficulties in achieving comparable and verifiable indicators in evaluations of building energy performance. The research objective has two parts: to review, compare, and discuss (i) requirements and (ii) evaluation methods used to achieve energy performance of residential buildings in Sweden, Norway and Finland. The work in this thesis includes reviews of the requirements used in national building codes and passive house criteria to achieve building energy performance, of methods used to evaluate compliance with such requirements, and of methods used specifically to evaluate the indicator Envelope Air Tightness.

The results show that different sets of indicators are used to achieve building energy performance in the studied building codes and passive house criteria. The methods used to evaluate compliance with requirements used to achieve building energy performance are also different, but calculation methods are generally more often used than measurement methods. The calculation- and measurement methods used are often simple. A methodology to analyze the deviation between predictions- and measurements of building energy performance (the performance gap) was developed, to investigate the effects of different evaluation methods on different indicators used to achieve building energy performance. The methodology was tested in a case-study. This study indicated that the choice of method affects which parts of the performance gap reflected in the indicators Supplied Energy (see Terminology), Net Energy (see Terminology), and Overall U-value. Among the reviewed methods to evaluate air tightness, the Fan/Blower Door Pressurization is well known and preferred by professionals in the field. The results in this thesis may be useful when choosing indicators and evaluation methods to achieve different objectives of improving building energy performance and in the quest towards comparable and verifiable indicators used to achieve building energy performance.

Place, publisher, year, edition, pages
Umeå: Umeå universitet, 2015. 50 p.
Keyword
building codes, energy performance, evaluation methods, air tightness
National Category
Other Civil Engineering Building Technologies Energy Systems
Identifiers
urn:nbn:se:umu:diva-103749 (URN)978-91-7601-297-0 (ISBN)
Presentation
2015-06-04, MC 314, Umeå university, 901 87 Umeå, 16:33 (English)
Supervisors
Projects
Increasing Energy Efficiency in Buildings (IEEB)Sustainable Buildings for the High North (SBHN)
Available from: 2015-08-25 Created: 2015-05-28 Last updated: 2015-08-25Bibliographically approved

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Allard, IngridOlofsson, ThomasHassan, Osama

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