Indoor ultrafine particles of outdoor origin: Importance of building operating conditions

Donghyun Rim, Lance Wallace, Andrew Persily

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

Abstract

Airborne ultrafine particles (UFP) have been associated with human mortality and morbidity. Human exposure to ambient UFP occurs indoors due to entry of UFP into buildings. This study investigates UFP infiltration as a function of building operating conditions such as central air distribution fan operation and window position. Experiments were conducted involving continuous monitoring of indoor and outdoor UFP concentrations along with air change rate measurement in a test house. The study results showed that the UFP infiltration varies with particle size, air change rate and central fan operation. Infiltration increases with particle size from 5 nm to 100 nm. Larger window openings lead to higher infiltration factors due to increased air change rates. Smaller values of infiltration factor were observed with the central fan on, which was likely caused by additional particle deposition loss to the furnace filter and duct surfaces.

Original languageEnglish (US)
Title of host publication10th International Conference on Healthy Buildings 2012
Pages1014-1019
Number of pages6
StatePublished - Dec 1 2012
Event10th International Conference on Healthy Buildings 2012 - Brisbane, QLD, Australia
Duration: Jul 8 2012Jul 12 2012

Publication series

Name10th International Conference on Healthy Buildings 2012
Volume2

Other

Other10th International Conference on Healthy Buildings 2012
CountryAustralia
CityBrisbane, QLD
Period7/8/127/12/12

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

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  • Cite this

    Rim, D., Wallace, L., & Persily, A. (2012). Indoor ultrafine particles of outdoor origin: Importance of building operating conditions. In 10th International Conference on Healthy Buildings 2012 (pp. 1014-1019). (10th International Conference on Healthy Buildings 2012; Vol. 2).