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Effect of energy renovation on indoor air quality in multifamily residential buildings in Slovakia
Slovak University of Technology, Slovakia.
Technical University of Denmark, Denmark.
IVL Swedish Environmental Research Institute, Sweden ; Chalmers University of Technology, Sweden.
RISE - Research Institutes of Sweden, Bioscience and Materials, Chemistry and Materials.ORCID iD: 0000-0002-4037-3106
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2017 (English)In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 122, p. 363-372Article in journal (Refereed) Published
Abstract [en]

Buildings are responsible for a substantial portion of the global energy consumption. Most of the multifamily residential buildings built in the 20th century in Central and Eastern Europe do not satisfy the current requirements on energy efficiency. Nationwide measures taken to improve the energy efficiency of these buildings rarely consider their impact on the indoor air quality (IAQ). The objective of the present study was to evaluate the impact of simple energy renovation on IAQ, air exchange rates (AER) and occupant satisfaction in Slovak residential buildings. Three pairs of identical naturally ventilated multifamily residential buildings were examined. One building in each pair was newly renovated, the other was in its original condition. Temperature, relative humidity (RH) and the concentration of carbon dioxide (CO2) were measured in 94 apartments (57%) during one week in the winter. A questionnaire related to perceived air quality, sick building syndrome symptoms and airing habits was filled by the occupants. In a companion experiment, the IAQ was investigated in 20 apartments (50%) of a single residential building before and after its renovation. In this experiment, concentrations of nitrogen dioxide (NO2), formaldehyde and total and individual volatile organic compounds (VOC) were also measured. CO2 concentrations were significantly higher and AERs were lower in the renovated buildings. Formaldehyde concentrations increased after renovation and were positively correlated with CO2 and RH. Energy renovation was associated with lower occupant satisfaction with IAQ. Energy retrofitting efforts should be complemented with improved ventilation in order to avoid adverse effects on IAQ.

Place, publisher, year, edition, pages
2017. Vol. 122, p. 363-372
Keywords [en]
Air exchange rate, Apartment buildings, Natural ventilation, Occupant perception, Retrofitting, Air, Air quality, Apartment houses, Carbon, Carbon dioxide, Energy efficiency, Energy utilization, Finance, Formaldehyde, Housing, Indoor air pollution, Intelligent buildings, Nitrogen compounds, Nitrogen oxides, Ventilation, Volatile organic compounds, Air exchange rates, Central and Eastern Europe, Formaldehyde concentrations, Sick building syndrome symptoms, Volatile organic compound (VOC), Buildings
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Natural Sciences
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URN: urn:nbn:se:ri:diva-30814DOI: 10.1016/j.buildenv.2017.06.009Scopus ID: 2-s2.0-85021204935OAI: oai:DiVA.org:ri-30814DiVA, id: diva2:1138643
Available from: 2017-09-06 Created: 2017-09-06 Last updated: 2018-07-20Bibliographically approved

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Arrhenius, Karine

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