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In recent years, indoor air quality issues related to human bioeffluents have increased. It is important to reduce the ventilation rate by using air purifiers in combination to save energy. This study focused on evaluating the removal of human bioeffluents using special activated carbon-based air purifiers. We conducted chamber experiments and odour assessments to evaluate the air quality. In the chamber experiments, two participants remained in the chamber in a chair-sitting resting position, and the differences in chemical air concentrations and odour assessment results were compared before and after the operation of the air purifiers. After the operation of the air purifiers, there was a noticeable reduction in the concentration of chemical compounds, accompanied by a significant decrease in odour intensity. These results prove the possibility of removing some volatile organic compounds and improving the perceived air quality with special activated carbon-based air purifiers. In this study, the odour bag method, in which air collected in a sampling bag is pushed out and sniffed through a small hole, was compared with the direct sniffing method according to ISO 16000-44. The odour bag method tended to report lower odour intensity, suggesting that the direct sniffing method may be more suitable for evaluating relatively low-intensity odours, such as body odour in this study.

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Comparison of Different Odour Evaluation Methods for the Perceived Air Quality Improvement Effect by Air Purifiers

  • 会议论文

  • 发表日期：

    2026年

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  • Hidetaka Iwaizumi,
  • Nami Akamatsu,
  • Soma Sugano,
  • Naho Tomita,
  • Yuki Takeda,
  • Hyntae Kim,
  • Shoichi Morimoto,
  • Norikazu Kobayashi,
  • Shin-ichi Tanabe

摘要

In recent years, indoor air quality issues related to human bioeffluents have increased. It is important to reduce the ventilation rate by using air purifiers in combination to save energy. This study focused on evaluating the removal of human bioeffluents using special activated carbon-based air purifiers. We conducted chamber experiments and odour assessments to evaluate the air quality. In the chamber experiments, two participants remained in the chamber in a chair-sitting resting position, and the differences in chemical air concentrations and odour assessment results were compared before and after the operation of the air purifiers. After the operation of the air purifiers, there was a noticeable reduction in the concentration of chemical compounds, accompanied by a significant decrease in odour intensity. These results prove the possibility of removing some volatile organic compounds and improving the perceived air quality with special activated carbon-based air purifiers. In this study, the odour bag method, in which air collected in a sampling bag is pushed out and sniffed through a small hole, was compared with the direct sniffing method according to ISO 16000-44. The odour bag method tended to report lower odour intensity, suggesting that the direct sniffing method may be more suitable for evaluating relatively low-intensity odours, such as body odour in this study.