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Featured researches published by Lari Eskola.


Journal of Building Physics | 2008

A Comparison of Measured and Simulated Air Pressure Conditions of a Detached House in a Cold Climate

Juha Jokisalo; Targo Kalamees; Jarek Kurnitski; Lari Eskola; Juha Vinha

This study discusses the evaluation exercise of a multi-zone infiltration model of an existing two-storey detached house in the cold Finnish climate. This study is performed by comparing the simulated and measured pressure conditions of the building during a 3-week test period in the heating season. The simulations are carried out using a dynamic simulation tool, IDA-ICE, which combines whole-building energy simulation and infiltration modeling. The initial data of the building model are obtained with extensive field measurements, including measurements of the airtightness and air leakage distribution of the envelope and performance of the ventilation system. The study shows that the model is realistically able to predict the air pressure conditions of a detached house in a cold climate and it is suitable for detailed infiltration and energy analyses. The model allows the prediction of the effects of leakage distribution, airflows between rooms and floors, building leakage rate, pressure conditions, and climate on infiltration and energy use.


Building Services Engineering Research and Technology | 2010

Measured and simulated air pressure conditions in Finnish residential buildings

Targo Kalamees; Jarek Kurnitski; Juha Jokisalo; Lari Eskola; Juha Vinha

Air pressure conditions in typical Finnish residences are analysed using data from field measurements and computer simulations. Field measurements were conducted in three two-storey detached houses and in two five-storey apartment buildings. The effects of air tightness, ventilation performance, air leakage distributions, and outdoor environmental conditions on air pressure conditions in a detached house were simulated with a multi-zone simulation model using the IDA ICE simulation program. Despite of common design assumption, negative air pressure difference indoors, the results show that there is almost always a positive and negative air pressure difference across the building envelope in detached houses and apartment buildings. For detached houses, the design value of the air pressure difference across the building envelope for moisture convection analysis should be at least ±10 Pa. In the most critical cases (airtight building envelope with unbalanced ventilation), the air pressure difference across the building envelope may rise up to ±30 Pa. To control extremely high air pressure differences in airtight houses, balancing ventilation systems are very important. As in new low-energy houses the airtight building envelope and mechanical supply and exhaust ventilation become the standard solution; the interaction between HVAC systems and building envelope should be carefully designed. Practical application: Based on field measurements and computer simulations the design value of air pressure difference across the building envelope is determined for Finnish dwellings. Results underline the importance of balancing of ventilation in airtight house otherwise is not possible to control extremely high air pressure differences. If ventilation system should control the air pressure difference, building envelope should be airtight, because in normal and leaky houses (n50>41/h) the differences in ventilation airflows are too small and they have only a minor influence on the air pressure difference.


Indoor Air | 2007

Potential effects of permeable and hygroscopic lightweight structures on thermal comfort and perceived IAQ in a cold climate

Jarek Kurnitski; Targo Kalamees; Jari Palonen; Lari Eskola; Olli Seppänen


Archive | 2008

The distribution of the air leakage places and thermal bridges in Finnish detached houses and apartment buildings

Targo Kalamees; Minna Korpi; Lari Eskola; Jarek Kurnitski; Juha Vinha


Archive | 2005

Ventilation in 102 Finnish single-family houses

Jarek Kurnitski; Lari Eskola; Jari Palonen


Archive | 2007

Air pressure conditions in Finnish residences

Targo Kalamees; Jarek Kurnitski; Juha Jokisalo; Lari Eskola; Juha Vinha


Archive | 2007

Infiltration simulation in a detached house - Empirical model validation

Juha Jokisalo; Targo Kalamees; Jarek Kurnitski; Lari Eskola; Juha Vinha


Archive | 2009

Asuinrakennusten ilmanpitävyys, sisäilmasto ja energiatalous

Juha Vinha; Minna Korpi; Targo Kalamees; Juha Jokisalo; Lari Eskola; Jari Palonen; Jarek Kurnitski; Hanna Aho; Mikko Salminen; Kati Salminen; Matias Keto


Archive | 2005

Puurunkoisten pientalojen kosteus- ja lämpötilaolosuhteet, ilmanvaihto ja ilmatiiviys

Juha Vinha; Minna Korpi; Targo Kalamees; Lari Eskola; Jari Palonen; Jarek Kurnitski; Ilkka Valovirta; Antti Mikkilä; Juha Jokisalo


Archive | 2008

Thermal comfort and perceived air quality in 102 Finnish single family houses

Jari Palonen; Jarek Kurnitski; Lari Eskola

Collaboration


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Jarek Kurnitski

Tallinn University of Technology

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Juha Vinha

Helsinki University of Technology

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Jari Palonen

Helsinki University of Technology

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Minna Korpi

Tampere University of Technology

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Jarek Kurnitski

Tallinn University of Technology

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Kati Salminen

Tampere University of Technology

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Olli Seppänen

Helsinki University of Technology

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