A New Laboratory Scale Methodology to Test Portable Air Cleaner (PAC) Devices: Optimization and Application DOI Creative Commons
Mattia Borelli, Andrea Bergomi, Paola Fermo

et al.

Indoor Air, Journal Year: 2024, Volume and Issue: 2024(1)

Published: Jan. 1, 2024

Given that people spend on average more than 80% of their time indoors, monitoring indoor air quality (IAQ) is the utmost importance for safeguard human health. Indeed, due to penetration from outdoors and presence specific sources, poor IAQ not uncommon. The use portable cleaners (PACs) one many options improve IAQ. market offers products, but all them have reliable documentation effectiveness. Literature standard methods testing PACs toward pollutants require extensive resources. In this work, we developed a new laboratory scale methodology based small, easy use, economical batch system test efficiency PACs. With method, three commercial were successfully tested effectiveness volatile organic compounds (VOCs) particulate matter (PM). method proved successful, results highlighted conducting these tests, in addition field investigations.

Language: Английский

The efficiency of portable air cleaners in reducing cross-exposure through respiratory aerosols: Effects of flowrate, location, and unit type DOI Creative Commons
Ihab Jabbar Al Rikabi, Hayder Alsaad, Svenja Carrigan

et al.

Building and Environment, Journal Year: 2024, Volume and Issue: unknown, P. 112199 - 112199

Published: Oct. 1, 2024

Language: Английский

Citations

1
Study on the Effectiveness of a Copper Electrostatic Filtration System "Aerok 1.0" for Air Disinfection DOI Open Access
Roberto Albertini, Maria Eugenia Colucci,

Isabella Viani

et al.

Published: Aug. 15, 2024

Background: Bioaerosol can represent a danger to the health. During SARS-CoV-2 pandemic, portable devices were used in different environments and considered valuable prevention tool. This study has evaluated effectiveness of air treatment device “AEROK 1.0” reducing microbial, particulate pollen airborne contamination indoors, during normal activity. Methods: In an administrative room, microbial was measured using active (DUOSAS 360 MD8) passive sampling; particle counter evaluate concentrations; Hirst-type trap assess Alternaria spores. Statistical analysis performed SPSS 26.0; p values <0.05 statistically significant. Results: The bacterial assessed by two samplers decreased 55.54% 69.13%, respectively. sampling 44.16%. For fungi, reduction 38.7% sampling. Airborne particles (diameters ≥ 1.0, 2.0 μm) ratio indoor/outdoor concentrations total spp spores significantly decreased. Conclusions: results highlight AEROK 1.0 contamination. approach carried out represents contribution definition standardized model for evaluating this type devices.

Language: Английский

Citations

1
Study protocol for a one-year, randomized, single-blind, clinical trial of stand-alone indoor air filtration in the homes of U.S. military Veterans with moderate to severe COPD in metropolitan Chicago DOI Creative Commons
Brent Stephens,

Insung Kang,

Kaveeta Jagota

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 27, 2024

Abstract Background Exposure to air pollutants is associated with adverse chronic obstructive pulmonary disease (COPD) outcomes. Although indoor filtration can improve outcomes, few studies have investigated for improving health-related outcomes in distinct patient populations COPD.Methods This study seeks evaluate the effectiveness of stand-alone reducing residential particulate matter concentrations and a high-risk urban cohort U.S. military Veterans COPD metropolitan Chicago using long-term (1-year), randomized, single-blind, placebo-controlled, case-control trial. Participants are randomized receive placebo/sham unit or normally functioning containing HEPA, activated carbon, zeolite media. Low-cost sensors measure plug load data loggers cleaner operation each home throughout duration. The primary outcome physician-diagnosed exacerbations acute over Secondary include changes quality life (HR-QoL), assessed at recruitment after 12-months intervention COPD-specific version St. George’s Respiratory Questionnaire (SGRQ-C) RAND 36-Item Health Survey (VR-36), clinical (e.g., emergency room unscheduled medical visits, 6-minute walk distance (6MWD), oxygen saturation) baseline, endline, study. Housing condition assessments also conducted characterize participant homes housing-related factors that may contribute exacerbation influence intervention. Our goal recruit 80 participants. population expected be predominantly African American, significant proportion living historically underserved, low socioeconomic status neighborhoods.Discussion Outcomes from this pragmatic, real-world trial potential inform policy practice both healthy housing care by evaluating impacts use portable patients on pollutant providing novel associations between conditions cohort, as well insight into operation, vulnerable population.Trial Registration: ClinicalTrials.gov: NCT05913765 (retrospectively registered, June 22, 2023)

Language: Английский

Citations

1
Study on the Effectiveness of a Copper Electrostatic Filtration System “Aerok 1.0” for Air Disinfection DOI Open Access
Roberto Albertini, Maria Eugenia Colucci,

Isabella Viani

et al.

International Journal of Environmental Research and Public Health, Journal Year: 2024, Volume and Issue: 21(9), P. 1200 - 1200

Published: Sept. 10, 2024

Background: Bioaerosols can represent a danger to health. During SARS-CoV-2 pandemic, portable devices were used in different environments and considered valuable prevention tool. This study has evaluated the effectiveness of air treatment device “AEROK 1.0®” reducing microbial, particulate, pollen airborne contamination indoors, during normal activity. Methods: In an administrative room, microbial was measured using active (DUOSAS 360 MD8) passive sampling; particle counter evaluate concentrations; Hirst-type trap assess Alternaria spores. Statistical analysis performed SPSS 26.0; p values < 0.05 statistically significant. Results: The bacterial assessed by two samplers decreased 56% 69%, respectively. sampling 44%. For fungi, reduction 39% sampling. Airborne particles (diameters ≥ 1.0, 2.0 μm) ratio indoor/outdoor concentrations total spp. spores significantly decreased. Conclusions: results highlight AEROK 1.0® contamination. approach carried out represents contribution definition standardized model for evaluating be disinfection.

Language: Английский

Citations

0
Associations of indoor airborne microbiome with lung function: evidence from a randomized, double-blind, crossover study of microbial intervention DOI
Yetong Zhao, Shan Liu, Wanzhou Wang

et al.

Environmental Science Processes & Impacts, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Indoor airborne microbiome contributes to human lung function and can be modified by air purification.

Language: Английский

Citations

0
Accounting for in-situ air cleaner utilization and performance to improve interpretation of patient outcomes in real-world indoor air cleaner intervention trials DOI
Saeed Farhoodi, In-sung Kang,

Yicheng Zeng

et al.

Environmental Science Processes & Impacts, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 26, 2024

Air cleaner performance measurements in indoor air cleaning intervention trials.

Language: Английский

Citations

0
Assessing the Targeting Aerosol Removal Efficacy and Energy Efficiency of Portable Air Cleaner in Negative Pressure Isolation Ward DOI
Jiaxin Zhang, Junjie Liu, Shihao Wen

et al.

Published: Jan. 1, 2024

During the COVID-19 pandemic, negative-pressure isolation wards (NPIWs) became a crucial infrastructure for treating patients and safeguarding healthcare workers (HCWs). However, standard requirements full fresh air high changes per hour (ACH) make NPIWs extremely energy-intensive. The blind ventilation design of also poses potential exposure risks HCWs. To address these issues, portable cleaners (PACs) have been proven effective in removing bioaerosols from air, providing clean delivery rate (CADR) without need additional load. In this study, validated CFD model was used to simulate dispersion exhaled aerosols within an NPIW. impact incorporating PACs on targeting aerosol removal, HCW passive risk, wall deposition rates, energy consumption assessed. evaluate removal capacity PACs, we propose novel indicator called "TARGETINGPAC". gain comprehensive understanding various strategies NPIWs, transient distribution three different ACHs with simulated, resulting total 8 cases. simulations revealed that ceiling supply return is not suitable NPIWs. introduction reversed trend increasing by 38.5%-62.5%. Furthermore, reduced viral load HCWs' body surfaces walls while improving efficiency 12.6%-31.1% winter summer.

Language: Английский

Citations

0
Use of Portable Air Cleaners in Washington State Schools: A Qualitative Analysis Based on the Technology Acceptance Model DOI
Nancy Carmona, Edmund Seto,

Lisa S. Hayward

et al.

Journal of School Health, Journal Year: 2024, Volume and Issue: 94(10), P. 939 - 949

Published: June 18, 2024

ABSTRACT BACKGROUND The US government allocated over $2.5 billion in “Elementary and Secondary School Emergency Relief (ESSER)” funds to Washington State for COVID‐19 response ventilation improvements. Despite available funding, gaps persist supporting schools successfully use portable air cleaners (PACs). We evaluated PAC needs within King County, characterized factors influencing schools' purchase of PACs. METHODS Public Health—Seattle & County (PHSKC) assessed school's systems IAQ improvements through a survey (N = 17). Separately, semi‐structured interviews 13) based on the technology acceptance model (TAM) were conducted with school personnel. A thematic analysis using inductive deductive coding was logistic regression models predictive capability TAM. RESULTS PHSKC findings informed our recommendations. Positive attitudes, knowledge, beliefs ease effectiveness PACs facilitators use. While barriers included lack training, education, concerns about maintenance sustainability. TAM constructs perceived usefulness (PU) (PEU) having intention schools. CONCLUSIONS There is critical need solutions circumvent challenges implementing This characterization provides insight promoting IAQ‐impacted

Language: Английский

Citations

0
A New Laboratory Scale Methodology to Test Portable Air Cleaner (PAC) Devices: Optimization and Application DOI Creative Commons
Mattia Borelli, Andrea Bergomi, Paola Fermo

et al.

Indoor Air, Journal Year: 2024, Volume and Issue: 2024(1)

Published: Jan. 1, 2024

Given that people spend on average more than 80% of their time indoors, monitoring indoor air quality (IAQ) is the utmost importance for safeguard human health. Indeed, due to penetration from outdoors and presence specific sources, poor IAQ not uncommon. The use portable cleaners (PACs) one many options improve IAQ. market offers products, but all them have reliable documentation effectiveness. Literature standard methods testing PACs toward pollutants require extensive resources. In this work, we developed a new laboratory scale methodology based small, easy use, economical batch system test efficiency PACs. With method, three commercial were successfully tested effectiveness volatile organic compounds (VOCs) particulate matter (PM). method proved successful, results highlighted conducting these tests, in addition field investigations.

Language: Английский

Citations

0