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Analysis of hygrothermal parameters in Finnish and Lithuanian multi-family buildings before and after energy retrofits

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Original languageEnglish
Number of pages17
JournalJournal of Building Physics
Issue number4
Early online date1 Apr 2018
Publication statusPublished - 2019
Publication typeA1 Journal article-refereed


This study focuses on analyzing temperature- and moisture-related parameters based on data from 45 Finnish and 20 Lithuanian multi-family buildings. The data consist of two rounds of 2-month data-logging (1-h interval) of indoor temperature and relative humidity at two locations: one representing average occupied zone and the other one nearby the coldest spot of the building envelope. Between the two rounds of data-logging, 37 buildings from Finland and 15 buildings from Lithuania underwent retrofits, aiming to improve their energy efficiency. Measurement data were coupled with outdoor data from national weather stations, based on which a temperature factor (fc) and excess indoor moisture content (Δv) were calculated. Based on the results, fc was significantly higher in Lithuanian case buildings after the retrofits, whereas no significant differences were observed in Finnish buildings. In addition, Δv was significantly lower in Finnish case buildings after retrofits, whereas an opposite trend was seen in the Lithuanian buildings.


  • indoor moisture excess, relative humidity, surface temperature, Temperature, temperature factor

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Field of science, Statistics Finland

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