Associating different indoor air contaminant levels with various ventilation systems in K-12 classrooms

Josephine Lau, Yu Wen Liu, Kelly Johnson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

In this study, the research team sampled air for different contaminants in 220 classrooms. Contaminants measured included coarse particles with a diameter between 2.5 and 10 μm (PM coarse), particles with a diameter less than 2.5 μm (PM 2.5), formaldehyde, and total volatile organic compounds (TVOC). The data demonstrated that the levels of each contaminant fluctuated seasonally. There were three types of ventilation systems used in these classrooms: (1) centralized systems with variable air volume (VAV) air handling units (AHU); (2) single-zone heat pumps; and (3) unit ventilators. Classrooms equipped with unit ventilators were associated with significantly higher concentrations of PM coarse in all three seasons. For classrooms with centralized systems, PM 2.5 concentrations were significantly higher in the spring. However, there was no statistical difference in formaldehyde and TVOC levels. These results are beneficial for future study and design considerations to improve IAQ in educational environments.

Original languageEnglish (US)
Title of host publication16th Conference of the International Society of Indoor Air Quality and Climate
Subtitle of host publicationCreative and Smart Solutions for Better Built Environments, Indoor Air 2020
PublisherInternational Society of Indoor Air Quality and Climate
ISBN (Electronic)9781713823605
StatePublished - 2020
Event16th Conference of the International Society of Indoor Air Quality and Climate: Creative and Smart Solutions for Better Built Environments, Indoor Air 2020 - Virtual, Online
Duration: Nov 1 2020 → …

Publication series

Name16th Conference of the International Society of Indoor Air Quality and Climate: Creative and Smart Solutions for Better Built Environments, Indoor Air 2020

Conference

Conference16th Conference of the International Society of Indoor Air Quality and Climate: Creative and Smart Solutions for Better Built Environments, Indoor Air 2020
CityVirtual, Online
Period11/1/20 → …

Keywords

  • Indoor air quality
  • K-12 school environment
  • Seasonal variation
  • Ventilation systems

ASJC Scopus subject areas

  • Building and Construction
  • Computer Science Applications
  • Health, Toxicology and Mutagenesis
  • Pollution

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