Modelling VOC levels in a new office building using passive sampling, humidity, temperature, and ventilation measurements

Domhagen, Fredrik; Langer, Sarka; Kalagasidis, Angela Sasic

doi:10.1016/j.buildenv.2023.110337

Cited by 6 publications

(4 citation statements)

References 32 publications

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“…This means that elevated temperatures, such as those during bake-off, are not considered. Also, as observed in earlier studies, typical, small indoor variations in air temperature have negligible effects on emission rates …”

Section: Methodssupporting

confidence: 81%

“…Also, as observed in earlier studies, typical, small indoor variations in air temperature have negligible effects on emission rates. 12 …”

Section: Methodsmentioning

confidence: 99%

“…11 A common strategy for dealing with high VOC levels in new buildings is to arbitrarily increase ventilation flow rates. This serves two goals: to reduce VOC concentrations in indoor air to acceptable levels 12 and to increase material emission rates for faster depletion of the emission sources. 13 For example, building certification systems like LEED 14 and WELL 15 promote increasing ventilation rates above existing ventilation standards during initial stages of a building's occupancy.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Also, as observed in earlier studies, typical, small indoor variations in air temperature have negligible effects on emission rates. 12 There are several mathematical models that account for both diffusion within materials and sorption on surfaces. 30 The model proposed here is based on the commonly used c 0 −K−D models.…”

Section: ■ Introductionmentioning

confidence: 99%

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Theoretical Threshold for Estimating the Impact of Ventilation on Materials’ Emissions

Domhagen,

Langer,

Sasic Kalagasidis

2024

Environ. Sci. Technol.

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In new buildings, nonoccupant VOC emissions are initially high but typically decrease within months. Increased ventilation is commonly used to improve indoor air quality, assuming it speeds up VOC off-gassing from materials. However, previous research presents inconsistent results. This review introduces a simplified analytical model to understand the ventilation–emission relationship. By combining factors such as diffusivity, emitting area, and time, the model suggests the existence of a theoretical ventilation threshold beyond which enhanced ventilation has no further influence on emission rates. A threshold of approximately 0.13 L s–1 m–2 emitting area has been found for various VOCs documented in the existing literature, with which the conflicting results are explained. It is also shown that the threshold remains notably consistent across different boundary conditions and model resolutions, indicating its suitability for real-world applications.

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Section: Methodssupporting

confidence: 81%

“…Also, as observed in earlier studies, typical, small indoor variations in air temperature have negligible effects on emission rates. 12 …”

Section: Methodsmentioning

confidence: 99%