| Title: |
Comparing methods for aggregating indoor air pollutant concentration over space and time. |
| Authors: |
Petrou, G; Wang, Y; Chalabi, Z; Hsu, SC; Hutchinson, E; Milner, J; Symonds, P; Davies, M |
| Publisher Information: |
IOP Publishing |
| Publication Year: |
2025 |
| Collection: |
London School of Hygiene & Tropical Medicine: LSHTM Research Online |
| Description: |
This paper explores the impact of different approaches to aggregating the indoor concentration of fine particulate matter (PM2.5) in a case study home. Indoor- and outdoor-sourced PM2.5 was modelled in CONTAM-EnergyPlus for a bungalow occupied by a family of four in Plymouth, England. Simulations were conducted assuming energy efficiency levels typical of a 1950s home and following retrofit. Pollutants were modelled at a 5-min temporal resolution in bedrooms, kitchen and living room and aggregated according to four metrics: (i) household arithmetic mean concentration, (ii) household time-weighted mean concentration, (iii) arithmetic mean of individual exposure, and (iv) household arithmetic mean exposure. Comparing the household metrics revealed differences of up to 50.0 % (3.6 μg/m3) for the pre-retrofit model, which remained largely consistent following retrofit. When comparing against individual exposure, differences were observed for all three metrics and reached 55.6% (9.1 μg/m3) for the pre-retrofit model, and 50.6% (8.7 μg/m3) for the post-retrofit model. Approaches (i) and (ii) consistently underpredicted individual exposure. Further, the differences were greatest for the time-weighted mean method, suggesting that taking into consideration the total time that each room is occupied but not when it is occupied will not necessarily provide a more accurate description of occupant exposure compared to the simple arithmetic mean. To better represent individual exposure, data on occupant presence is required. |
| Document Type: |
article in journal/newspaper |
| File Description: |
text |
| Language: |
English |
| ISSN: |
1742-6588 |
| Relation: |
https://researchonline.lshtm.ac.uk/id/eprint/4678923/1/Petrou-etal-2025-Comparing-methods-for-aggregating-indoor-air-pollutant-concentration-over-space-and-time.pdf; Petrou, G; Wang, Y; Chalabi, Z; Hsu, SC; Hutchinson, E; Milner, J ORCID logo; Symonds, P; and Davies, M (2025) Comparing methods for aggregating indoor air pollutant concentration over space and time. Journal of physics. Conference series, 3140 (9). 092013-092013. ISSN 1742-6588 DOI:10.1088/1742-6596/3140/9/092013 |
| DOI: |
10.1088/1742-6596/3140/9/092013 |
| Availability: |
https://researchonline.lshtm.ac.uk/id/eprint/4678923/; https://doi.org/10.1088/1742-6596/3140/9/092013 |
| Rights: |
cc_by_4 |
| Accession Number: |
edsbas.289793EC |
| Database: |
BASE |