Window operation behaviour and indoor air quality during lockdown: A monitoring-based simulation-assisted study in London

Tahmasebi, Farhang; Wang, Yan; Cooper, Elizabeth; Godoy-Shimizu, Daniel; Stamp, Samuel; Mumovic, Dejan

doi:10.1177/01436244211017786

Cited by 21 publications

(12 citation statements)

References 19 publications

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“…14 The key parameters (e.g. discharge coefficient) related to the airflow model were estimated based on a recent calibration effort 15 focusing on the indoor CO 2 concentration of this flat. Note that because the MVHR system was rarely used, it was not considered during the EP model development phase.…”

Section: Methodsmentioning

confidence: 99%

Improving indoor air quality and occupant health through smart control of windows and portable air purifiers in residential buildings

Wang¹,

Cooper²,

Tahmasebi³

et al. 2022

Building Services Engineering Research and Technology

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Indoor exposure to PM2.5 (particulate matter with aerodynamic diameter less than 2.5 μm) has a substantial negative impact on people’s health. However, indoor PM2.5 can be controlled through effective ventilation and filtration. This study aimed to develop a smart control framework that (1) combines a portable home air purifier (HAP) and window control system to reduce indoor PM2.5 concentrations whilst maintaining thermal comfort; (2) evaluates the associated health impacts and additional energy use. The proposed framework was demonstrated through a simulation-based case study of a low-energy apartment. The simulation results showed that joint control of HAP and window openings has great potential to not only maintain thermal comfort but also achieve effective PM2.5 removal which, consequently, can lead to considerable health benefits at a low additional energy cost. Compared to similar previous studies, the strength of the proposed control framework lies in combining window operations and HAPs in the same system and including both thermal comfort and indoor PM2.5 as the control targets. This work also introduces a novel concept of linking a building control system with a health impact assessment, an important and innovative step in the creation of holistic and responsive building controls. Practical application: This study proposes a novel control framework that jointly controls portable home air purifiers (HAPs) and windows to maintain thermal comfort and achieve effective PM2.5 removal. The simulation results suggest that such a hybrid control strategy can result in considerable health benefits at low additional energy costs.

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Section: Methodsmentioning

confidence: 99%

Improving indoor air quality and occupant health through smart control of windows and portable air purifiers in residential buildings

Wang¹,

Cooper²,

Tahmasebi³

et al. 2022

Building Services Engineering Research and Technology

Self Cite

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show abstract

“…A study in Denmark [8], also finds that living rooms have the most homogeneous temperature distribution during a 24 h period and the bedroom hasthe most significant variations. Another study simulating window operation behavior foundbedrooms to have around 1.000 ppm higher concentration levels than living rooms when ventilation is not performed and in a lockdown scenario [31].…”

Section: Clo Factormentioning

confidence: 99%

What Is the Temperature Acceptance in Home-Office Households in the Winter?

et al. 2022

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Remote work can have many benefits when set up properly. Nevertheless, the preferences of home workers’ comfort havenot been profoundly studied yet. Therefore, this study aims to understand their accepted Indoor Environmental Quality values in winter based on self-reported comfort. In this regard, 26 households in Catalonia’s Mediterranean region were monitored and surveyed for separated periods of 15 days during from 22 November 2021 to 6 March 2022. Measurements including temperature, temperature, CO2 and Relative Humidity levels were data logged in their most used workspace. Results show that most people work between 18 °C to 20 °C and find those temperatures acceptable. Common spaces used as homeoffices are on average 0.8 °C warmer and there are 470 ppm lower CO2 concentrations. Families with children or teenagers and especially women tend to have a warmer mean operative temperature. The comparison between theoretical thermal comfort models (Fanger and Adaptive) to direct vote perception from a sample of spaces and conditions shows low correlation with real perception having the Adaptive model a better prediction of votes. In general, people report feeling more comfortable at the office, although a high number of participants feel indifferent or reckon that depends on other factors.

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“…2 Well-working ventilation is extremely important not only in the industries that use clean production, 3 but in public or residential buildings (schools, hospitals, apartments). [4][5][6][7] Microbial contamination of an indoor spaces includes hundreds of species of bacteria and fungi that thrive indoors when sufficient humidity is available. 8 Exposure is clinically associated with respiratory symptoms, allergies, asthma, and immune responses.…”

Section: Introductionmentioning

confidence: 99%

Culturable airborne fungi communities in naturally ventilated indoor spaces of old residential buildings in Poland

Kacprzak,

Stolarska,

Lis

2023

Building Services Engineering Research and Technology

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The fungal communities inhabiting apartments in multifamily buildings ( N = 33 apartments) with natural ventilation were determined during seasonal variation in the south part of Poland (Silesia region). It was found that the average level of CO2 concentration usually not exceeded 1000 ppm. The minimal value was noted in November – 402 ppm, however the maximal concentration was equal 6156 ppm and obtained in June. The average fungal colony forming units (CFU/m3) was calculated as follows: 1.06 × 102 (February), 1.17 × 102 (June) and 2.98 × 102 (November). The most frequently occurred species/genera: yeast and yeast-like fungi, Aspergillus niger, Penicillium spp., Cladosporium cladosporioides, Rhodotorula rubra; Culvaraia lunata, Dematiaceae family, Ulocladium consortiale, Verticillium spp.; Fusarium spp., Alternaria alternata; Oidiodendron griseum. The cluster analysis showed no mutual similarity between communities of air fungi isolated from bathrooms of all studied apartments as well as between communities isolated from other indoor spaces (rooms, kitchens, halls). This suggests that natural ventilation has no (or minimal effect) on the propagation of fungal spores between apartments. Statistically significant positive correlation between the concentration of fungi in the air and external humidity, carbon dioxide levels (February, November), and external temperature (November) were found. This study provides that natural ventilation has no effect on the spread of fungal spores inside the building and are not contributed to increase of fungal airborne health risk transmission. It also shows evidence of seasonal changes in carbon dioxide in multi-family homes with natural ventilation. This may give input to establish CO2 benchmark data in such type of buildings.

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Window operation behaviour and indoor air quality during lockdown: A monitoring-based simulation-assisted study in London

Cited by 21 publications

References 19 publications

Improving indoor air quality and occupant health through smart control of windows and portable air purifiers in residential buildings

Improving indoor air quality and occupant health through smart control of windows and portable air purifiers in residential buildings

What Is the Temperature Acceptance in Home-Office Households in the Winter?

Culturable airborne fungi communities in naturally ventilated indoor spaces of old residential buildings in Poland

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