Airtightness of a building envelope
Paramonova, Marina (2019)
Paramonova, Marina
2019
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-202003274039
https://urn.fi/URN:NBN:fi:amk-202003274039
Tiivistelmä
The main investigation object of this paper if the airtightness of a building envelope and its
influence of energy efficiency, indoor air quality and thermal conditions inside the building.
First of all, the legislation regulations for the airtightness of buildings and the measuring
methods were discovered. Secondly, the airtightness measurement took place at the end of
the construction process in the daycare center in a city in Finland. When the building was
commissioned, the indoor climate parameters were monitored to discover the influence of
the airtightness of the building envelope and air leakages on indoor air quality and thermal
comfort of occupants.
Finally, the results were analyzed. It was found out that the building envelope has high
airtightness. It was discovered that there is no significant influence on thermal conditions
inside the building. The temperature and relative humidity did not fluctuate much. However,
it was discovered that the low air leakage rate leads to a reduction of fresh air income inside
the building, which leads to the increase of indoor air pollutants and the decrease in indoor
air quality. That means that the ventilation system should be adjusted if the predicted number
of occupants increases.
The study showed that the improvement of airtightness leads to a reduction of the energy
demand of the building. However, the reduction of fresh air income should be taken into
account when the ventilation system is designed.
influence of energy efficiency, indoor air quality and thermal conditions inside the building.
First of all, the legislation regulations for the airtightness of buildings and the measuring
methods were discovered. Secondly, the airtightness measurement took place at the end of
the construction process in the daycare center in a city in Finland. When the building was
commissioned, the indoor climate parameters were monitored to discover the influence of
the airtightness of the building envelope and air leakages on indoor air quality and thermal
comfort of occupants.
Finally, the results were analyzed. It was found out that the building envelope has high
airtightness. It was discovered that there is no significant influence on thermal conditions
inside the building. The temperature and relative humidity did not fluctuate much. However,
it was discovered that the low air leakage rate leads to a reduction of fresh air income inside
the building, which leads to the increase of indoor air pollutants and the decrease in indoor
air quality. That means that the ventilation system should be adjusted if the predicted number
of occupants increases.
The study showed that the improvement of airtightness leads to a reduction of the energy
demand of the building. However, the reduction of fresh air income should be taken into
account when the ventilation system is designed.