Effects of ventilation improvement on measured and perceived indoor air quality in a school building with a hybrid ventilation system

Camilla Vornanen-Winqvist*, Heidi Salonen, Kati Järvi, Maria A. Andersson, Raimo Mikkola, Tamás Marik, László Kredics, Jarek Kurnitski

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

6 Sitaatiot (Scopus)
143 Lataukset (Pure)

Abstrakti

Ventilation system design and operation may significantly affect indoor air quality (IAQ). The aims of this case study were to investigate the functionality of a supply air fan-assisted hybrid ventilation system in a newly built school building with reported IAQ problems and to determine the effects of ventilation improvement on measured and perceived IAQ. The ventilation system function was researched simultaneously with IAQ measurements, with an analysis of total volatile organic compounds (TVOC), single volatile organic compounds (VOCs), and indoor mycobiota, and with questionnaires about perceived IAQ. At the baseline, an operational error of the ventilation system was found, which prevented the air from coming into the classrooms, except for short periods of high carbon dioxide (CO2 ) concentrations. After the ventilation operation was improved, a significant change in indoor mycobiota was found; the dominant, opportunistic human pathogenic species Trichoderma citrinoviride found in settled dust in the classroom before the improvement was no longer detected. In addition, the concentrations of CO2, TVOC, and some single VOCs, especially toluene and decamethylcyclopentasiloxane, decreased. The analysis of the questionnaire results indicated that the perceptions of unpleasant odors and stuffy air decreased, although a statistically significant improvement in perceived IAQ was not observed. The results provided evidence that the properly controlled hybrid ventilation system operating in mechanical supply mode provided adequate ventilation and was effective in decreasing the concentrations of some indoor-generated pollutants. With simple ventilation adjustments, microbiological exposure from building structures might be prevented.

AlkuperäiskieliEnglanti
Artikkeli1414
Sivumäärä18
JulkaisuInternational Journal of Environmental Research and Public Health
Vuosikerta15
Numero7
DOI - pysyväislinkit
TilaJulkaistu - 5 heinäkuuta 2018
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Sormenjälki Sukella tutkimusaiheisiin 'Effects of ventilation improvement on measured and perceived indoor air quality in a school building with a hybrid ventilation system'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.

  • Projektit

    • 2 Päättynyt

    Homepoliisi - sisäilmaongelmien havainnointi ja ennaltaehkäisy

    Selkäinaho, J., Harmo, P. & Visala, A.

    01/03/201630/06/2019

    Projekti: Business Finland: Other research funding

    Siteeraa tätä