Comparing mixing and displacement ventilation in classrooms: pupils' perception and health
2011 (English)In: Indoor Air, ISSN 0905-6947, E-ISSN 1600-0668, Vol. 21, no 6, 454-461 p.Article in journal (Refereed) Published
Several studies have found that indoor air quality (IAQ) in schools is often poor and may affect the health of the pupils. Building ventilation is a means to reduce pollutants indoors, but different designs should be evaluated for their effectiveness in different environments. In a field experiment performed at four classrooms in one school building, air was supplied either in the mixing or in the displacement mode, and we collected information on exposures, pupils' perception of IAQ and climate, and health symptoms and performed clinical examinations. The room temperature, relative humidity, concentration of CO(2) , and cat allergen were measured at the breathing height and were similar during each ventilation mode. The children perceived IAQ were similar in the two ventilation regimes, and there were few differences in symptom reports or clinical parameters. However, the pupils reported more eye symptoms during displacement ventilation. PRACTICAL IMPLICATIONS: Both mixing and displacement ventilation may be appropriate in school classrooms as long as the overall design, ventilation rates, and maintenance of systems are satisfactory.
Place, publisher, year, edition, pages
2011. Vol. 21, no 6, 454-461 p.
Experimental field study, Ventilation systems, Air quality, Cat allergen, Schools, Pupils, Symptoms
Environmental Health and Occupational Health
IdentifiersURN: urn:nbn:se:uu:diva-161516DOI: 10.1111/j.1600-0668.2011.00725.xISI: 000297417800003PubMedID: 21615502OAI: oai:DiVA.org:uu-161516DiVA: diva2:456395