Projects per year
This paper is a case study of ventilation and indoor air quality (IAQ) investigations in an extensively repaired comprehensive school in Finland. Our main hypothesis is that positive pressure between air indoors and outdoors can be used for decreasing the concentration of harmful chemical and microbiological agents in indoor air, as well as occupants´ complaints about IAQ, in a building waiting for new repairs or with unsolved IAQ problems. Research was undertaken on a building consisting of 12 classrooms, and served by one air handling unit. It found that the ventilation system was crucially unbalanced. However, IAQ measurements did not explain occupants´ symptoms, which were suspected to be related to the impurities leaked through the building envelope caused by the high negative pressure. To eliminate the potential harmful effects of the building related sources and infiltration airflows, the air handling unit was adjusted to generate a 5-7 Pa positive pressure for a period of 4 months. In the next planned phase of the study, moisture content of the structures during the heating season will be measured, as well as potential changes in perceived IAQ and microbial contamination.
|Title of host publication||11th Nordic Symposium on Building Physics, NSB2017|
|Number of pages||6|
|Publication status||Published - 2017|
|MoE publication type||A4 Article in a conference publication|
|Event||Nordic Symposium on Building Physics - Trondheim, Norway|
Duration: 11 Jun 2017 → 14 Jun 2017
Conference number: 11
|Conference||Nordic Symposium on Building Physics|
|Period||11/06/2017 → 14/06/2017|
- Positive pressure
- mechanical ventilation
- indoor air quality
- school building
FingerprintDive into the research topics of 'The effect of positive pressure on indoor air quality in a deeply renovated school building – a case study'. Together they form a unique fingerprint.
- 1 Finished
Toxin transport mechanisms from moisture damaged structures to indoor air
Castagnoli, E., Kurnitski, J., Mikkola, R., Ahmed, K., Piironen, J., Andersson, A., Vornanen-Winqvist, C., Taebnia, M., Alapieti, T., Järvi, K. & Salonen, H.
01/09/2015 → 31/08/2019
Project: Academy of Finland: Other research funding