Investigation of Indoor Air Quality in Residential Buildings by Measuring CO2 Concentration and a Questionnaire Survey

Indoor air quality (IAQ) in houses is often deteriorated by chemical substances emitted from heating, building materials, or other household goods. Since it is difficult for occupants to recognize air pollution, they rarely understand the actual conditions of the IAQ. An investigation into the actua...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2022-09, Vol.22 (19), p.7331
Main Authors: Hattori, Shunichi, Iwamatsu, Toshiya, Miura, Teruhisa, Tsutsumi, Fujio, Tanaka, Nobuyuki
Format: Article
Language:English
Subjects:
Air pollution
Air quality
Building materials
Carbon dioxide
Carbon dioxide concentration
CO2 concentration
Combustion
Construction materials
Heating
Houses
in-home sensing
Indoor air pollution
Indoor air quality
Investigations
Questionnaires
Residential buildings
Sensors
ventilation
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Summary:Indoor air quality (IAQ) in houses is often deteriorated by chemical substances emitted from heating, building materials, or other household goods. Since it is difficult for occupants to recognize air pollution, they rarely understand the actual conditions of the IAQ. An investigation into the actual condition of IAQ in houses was therefore conducted in this study. Carbon dioxide (CO2) concentrations in 24 occupied houses was measured, and the results from our analysis showed that the use of combustion heaters increased the concentration of CO2 and led to indoor air pollution. Results indicate that as outdoor temperature decreased, the frequency of ventilation decreased simultaneously, and CO2 concentration increased. Results of the questionnaire survey revealed that the actual IAQ in each house did not match the level of awareness its occupants had regarding ventilation. Along with this difficulty in perceiving air pollution, the lack of knowledge about ventilation systems and the effects of combustion heating may be additional barriers to IAQ awareness.
ISSN:1424-8220
1424-8220
DOI:10.3390/s22197331