Field Testing to Estimate Ozone Emission Rates of In-duct Air Cleaners in Occupied Homes

Abstract

Considerable concern, research, and regulation have been linked to the use of portable air cleaners that intentionally (or unintentionally) produce ozone in the indoor environment. This research focuses on the potential for electrically connected in-duct air cleaners to increase indoor concentrations of ozone in field sites. The objective of the research was to measure the incremental increase in the ozone concentration and estimate the in-use ozone emission rate when a commercially available in-duct air cleaning device is operating. Devices tested included UV lamps, photocatalytic oxidation systems and electrostatic precipitators. A field method was implemented in 6 houses and 1 commercial space. In-duct air cleaners produced ozone to varying degrees, increasing the indoor home concentration by as much as 134 ppb while operating normally in residences. Emission rates as high as 436 mg h-1 were observed., Explicit ozone generators were the highest emitters, raising indoor concentrations above 50 ppb in most tests. Most other devices did not raise ozone concentrations above 50 ppb and ozone emission rates for these devices were below 50 mg h-1.

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

Air cleaners; Measurements; Ozone

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 International Society of Indoor Air Quality and Climate (ISIAQ), All rights reserved.

Publication Date

01 Jan 2014

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