University of Oulu

Fedorik, F., Alitalo, S., Savolainen, J.-P., Räinä, I., & Illikainen, K. (2021). Analysis of hygrothermal performance of low-energy house in Nordic climate. Journal of Building Physics, 45(3), 344–367.

Analysis of hygrothermal performance of low-energy house in Nordic climate

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Author: Fedorik, Filip1; Alitalo, Sanna2; Savolainen, Jukka-Pekka3;
Organizations: 1Structures and Construction Technology, University of Oulu, Oulu, Finland
2School of Engineering, Oulu University of Applied Sciences, Oulu, Finland
3Saikotek Oy, Oulu, Finland
4City of Oulu, Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 2 MB)
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Language: English
Published: SAGE Publications, 2021
Publish Date: 2021-12-14


Analyses of hygrothermal conditions in low-energy houses is important because of their likely sensitivity for excessive moisture. The presented work deals with real-time measurement of temperature and relative humidity at multiple locations inside a low-energy house envelope. The measured data allows diagnosing approaches towards building design and understanding and evaluating the house performance. Suitability and accuracy of numerical computation was analysed. The Finnish mould growth model was used to monitor risk and extent of mould growth under measured and computed conditions. The measured conditions represent more favourable environment to avoid mould growth than the design values recommended by national and international guidelines. There was no mould growth indicated at any monitored points of the envelope. Monitoring the hygrothermal conditions provides valuable information about the performance of structural elements, building material and the house envelope and it helps to predict moisture related risks during the building’s service life.

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Series: Journal of building physics
ISSN: 1744-2591
ISSN-E: 1744-2583
ISSN-L: 1744-2591
Volume: 45
Issue: 3
Pages: 344 - 367
DOI: 10.1177/1744259120984187
Type of Publication: A1 Journal article – refereed
Field of Science: 212 Civil and construction engineering
Funding: We are grateful for support for this project through funding from the European Union Interreg 4A Nord programme (Increasing Energy Efficiency in Buildings (IEEB)) and from the Academy of Finland (Climate Change and Health (CLIHE) project 329885, awarded to Filip Fedorik).
Academy of Finland Grant Number: 329885
Detailed Information: 329885 (Academy of Finland Funding decision)
Copyright information: © 2021 SAGE Publications. The final authenticated version is available online at