Should We Differentiate Ventilation Requirements for Different User Groups?
The aim of our study is to investigate whether it is necessary to adjust the ventilation requirements according to different user groups. This study is focusing especially on teenagers, who might have a higher odour load than children due to increased hormone and sweat production during puberty. The odour intensity (OI) and the perceived air quality (PAQ) were evaluated in four classrooms in Oslo, Norway. Two control classrooms of 9–11 years olds (children) were compared with two case classrooms of 12–15 years olds (teenagers). A sensory panel of 18 untrained people visited the four classrooms three times during a three-hour period and were asked to evaluate PAQ and OI upon entering the classrooms. The classrooms were supplied with a constant ventilation rate of 7 l/s per person, with no additional ventilation for building materials. We found that the classroom with children had a significant better PAQ-score than both classrooms with teenagers. Furthermore, although the ventilation rate per person was reduced, the percentage of panellists dissatisfied with OI and PAQ was lower (<20%) than expected. Our results indicate that children and teenagers have different sensory pollution loads, and therefore might need differentiated ventilation rates if the ventilation rates were to be optimised. However, more research is needed.
KeywordsPerceived air quality Odour intensity Percentage of dissatisfied Ventilation rate IAQ Sensory pollution load Bioeffluents Untrained panel School
This paper is based on the master thesis by Nora Holand, and was a part of the BEST VENT project. BEST VENT is funded by the Research Council of Norway EnergiX program under Grant 255375/E20 together with the industry partners Undervisningsbygg Oslo KF, GK Inneklima AS, DNB Næringseiendom AS, Erichsen & Horgen AS, Hjellnes Consult AS, Multiconsult AS, Interfil AS, Camfil Norge AS, Swegon AS, Belimo Automasjon Norge AS, NEAS AS, Norsk VVS Energi- og Miljøteknisk Forenings Stiftelse for forskning.
Compliance with ethical standards
This study involves no more than minimal risk and involves no procedures for which consent is required from parents/LAR. Formal consent was given by the school and the teachers to visit the classrooms during teaching hours. We did not collect any identifiable or sensitive information that would require ethical approval. The research has been conducted in compliance with the ethical standards at OsloMet—Oslo Metropolitan University (formerly Oslo and Akershus University College of Applied Science) and Norwegian Law.
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