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The Thermal Comfort and Hygrothermal Performance of the First Certified Passive House in Estonia
Targo Kalamees
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DOI:doi: 10.17265/1934-7359/2024.04.002
Building Physics and Energy Efficiency, Tallinn University of Technology, Tallinn 12616, Estonia
This study presents the thermal comfort and hygrothermal performance of building envelope of the first certified passive single-family detached house in Estonia. Temperature and humidity conditions were measured from different rooms and building envelopes. This article presents analysis of measurement results during the first year after construction. Results showed high room temperature, achieved mainly due to large windows with southern exposure and the small heat loss of the building envelope. High indoor temperature decreased the indoor RH (relative humidity) to quite low levels. Even the RH was low, the moisture excess was high indicating that the design of PH (passive houses) indoor humidity loads cannot be decreased. Humidity in the externally insulated cross-laminated timber panels was observed to be high, caused by drying out of the constructional moisture and the high diffusion resistance of the wood fibre sheathing board. That caused water vapour condensation and risk for mould growth. In conclusion, while planning buildings with high-energy efficiency, more focused attention should be paid to the performance of the building service systems and moisture safety already in the preliminary stages of design.
PH, nZEB (nearly zero-energy building), hygrothermal performance, moisture safety, indoor climate, overheating.
Journal of Civil Engineering and Architecture 18 (2024) 165-174 doi: 10.17265/1934-7359/2024.04.002
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