☆ 4.7 Article

Using in-situ CO2, PM1, PM2.5, and PM10 measurements to assess air change rates and indoor aerosol dynamics

BUILDING AND ENVIRONMENT (2022)

Related references

Note: Only part of the references are listed.

Article Construction & Building Technology

Decay rates of two tracer gases compared to DNA-tagged liquid aerosol tracer particles: Impact of varying dilution rate and filtration

Ilan Arvelo et al.

Summary: Current gas and aerosol tracers cannot accurately simulate the emission and transmission of liquid aerosols containing pathogens indoors. This study evaluated the use of a liquid aerosol tracer containing synthetic DNA to simulate the particle size distribution of aerosols containing DNA. The results showed that DNA-tagged tracer aerosols can effectively simulate the emission and transport of liquid aerosols in a room, and the decay rate of DNA tracer concentrations can be used to evaluate the effectiveness of aerosol control strategies.

BUILDING AND ENVIRONMENT (2022)

Add to Collection

Article Engineering, Environmental

Investigating the Sources of Urban Air Pollution Using Low-Cost Air Quality Sensors at an Urban Atlanta Site

Laura Hyesung Yang et al.

Summary: Advances in low-cost sensors (LCS) have provided opportunities to characterize air quality in finer spatial and temporal resolutions. In this study, LCS were deployed in Atlanta, GA, alongside research-grade instruments to investigate air pollution sources using non-negative matrix factorization (NMF). Results show that both normalized and non-normalized LCS datasets can resolve primary organic aerosol (POA) factors, while normalization can provide factors with more diverse compositions and resolve secondary organic aerosol (SOA) as well.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Add to Collection

Article Construction & Building Technology

Development and application of an indoor carbon dioxide metric

Andrew Persily

Summary: Indoor carbon dioxide (CO2) concentrations have long been used to evaluate indoor air quality (IAQ) and ventilation, as well as to discuss the risk of airborne infectious disease transmission. However, the significance of indoor CO2 levels, ventilation, and IAQ is often misunderstood. This paper presents an approach to estimate space-specific CO2 levels that can serve as a metric for outdoor ventilation rates.

INDOOR AIR (2022)

Add to Collection

Article Meteorology & Atmospheric Sciences

Performance characterization of low-cost air quality sensors for off-grid deployment in rural Malawi

Ashley S. Bittner et al.

Summary: This study explores the calibration and validation methods for low-cost gas and particulate matter monitors before deployment in Malawi. The research finds that the k-nearest neighbors hybrid model provides the best performance for calibrating electrochemical gas sensors and is also transferable to deployment data in Malawi. Additionally, the study reveals that environmental conditions significantly affect the performance of the OPC-N2 optical particle counter.

ATMOSPHERIC MEASUREMENT TECHNIQUES (2022)

Add to Collection

Review Construction & Building Technology

Residential air-change rates: A critical review

William W. Nazaroff

Summary: Air-change rate is an important parameter for residential air quality, influenced by factors such as weather, building envelope leakiness, and mechanical ventilation systems. Occupancy-related factors like window opening, exhaust, and heating also affect air-change rates. Studies show a central tendency and varying range of air-change rates, but challenges remain in understanding time variations and tracer-gas measurement techniques.

INDOOR AIR (2021)

Add to Collection

Article Environmental Sciences

Characteristics of indoor air pollutants and estimation of their exposure dose

Sangita Ghatge Goel et al.

Summary: This study compared indoor air pollution sources in rural areas of developing countries and found that incense sticks, dhoop, mosquito coils, and charcoal have high pollution potential. Dhoop was found to emit the highest concentration of metal Sb, and decay rates varied among different sources. Children and young adults were identified as the most vulnerable groups to PM emissions from dhoop and incense sticks.

AIR QUALITY ATMOSPHERE AND HEALTH (2021)

Add to Collection

Editorial Material Multidisciplinary Sciences

A paradigm shift to combat indoor respiratory infection Building ventilation systems must get much better

Lidia Morawska et al.

SCIENCE (2021)

Add to Collection

Correction Chemistry, Analytical

A Review of Low-Cost Particulate Matter Sensors from the Developers' Perspectives (vol 20, 6819, 2020)

Brigida Alfano et al.

SENSORS (2021)

Add to Collection

Article Environmental Sciences

Experimental Investigation of Aerosol and CO2 Dispersion for Evaluation of COVID-19 Infection Risk in a Concert Hall

Wolfgang Schade et al.

Summary: The dispersion of small aerosols in a concert hall was experimentally studied to evaluate the risk of SARS-CoV-2 infection during a concert. The results showed that under certain conditions of fresh air ventilation, aerosols and CO2 did not accumulate within a hazardous range.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH (2021)

Add to Collection

Article Engineering, Environmental

Exhaled CO2 as a COVID-19 Infection Risk Proxy for Different Indoor Environments and Activities

Zhe Peng et al.

Summary: This study explores the use of CO2 as a proxy for SARS-CoV-2 concentrations indoors, deriving analytical expressions for CO2-based risk proxies and emphasizing the importance of keeping CO2 levels low to optimize ventilation protection. The research shows that the level of CO2 corresponding to a given absolute infection risk varies significantly across different environments and activities, providing more specific and practical recommendations for low-cost CO2-based indoor infection risk monitoring despite uncertainties in infection risk estimates.

ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS (2021)

Add to Collection

Article Construction & Building Technology

Investigation of potential aerosol transmission and infectivity of SARS-CoV-2 through central ventilation systems

Leonard F. Pease et al.

Summary: This study evaluates the concentrations and probabilities of infection for both building interior and exterior exposure sources using a well-mixed model in a multiroom building served by a central air handling system. It found that slower air change rates reduce infectivity in connected rooms, filtration lowers the concentration and probability of infection the most in connected rooms, and increasing the outdoor air to 33% or using MERV-13 filter can significantly decrease infectivity in connected rooms.

BUILDING AND ENVIRONMENT (2021)

Add to Collection

Article Environmental Sciences

Size-resolved surface deposition and coagulation of indoor particles

Ye Xiao et al.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH (2020)

Add to Collection

Article Construction & Building Technology

Particulate matter in mechanically ventilated high school classrooms

Jianlin Ren et al.

BUILDING AND ENVIRONMENT (2020)

Add to Collection

Article Construction & Building Technology

Ventilation rates in naturally ventilated primary schools in the UK; Contextual, Occupant and Building-related (COB) factors

Sepideh Sadat Korsavi et al.

BUILDING AND ENVIRONMENT (2020)

Add to Collection

Article Green & Sustainable Science & Technology

Assessment of Ventilation Efficiency in School Classrooms Based on Indoor-Outdoor Particulate Matter and Carbon Dioxide Measurements

Jakub Bartyzel et al.

SUSTAINABILITY (2020)

Add to Collection

Article Critical Care Medicine

Particle sizes of infectious aerosols: implications for infection control

Kevin P. Fennelly

LANCET RESPIRATORY MEDICINE (2020)

Add to Collection

Review Environmental Sciences

Minimum Sizes of Respiratory Particles Carrying SARS-CoV-2 and the Possibility of Aerosol Generation

Byung Uk Lee

INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH (2020)

Add to Collection

Article Meteorology & Atmospheric Sciences

Assessing the accuracy of low-cost optical particle sensors using a physics-based approach

David H. Hagan et al.

ATMOSPHERIC MEASUREMENT TECHNIQUES (2020)

Add to Collection

Article Archaeology

Assessment of the impact of particulate dry deposition on soiling of indoor cultural heritage objects found in churches and museums/libraries

Sofia Eirini Chatoutsidou et al.

JOURNAL OF CULTURAL HERITAGE (2019)

Add to Collection

Article Engineering, Environmental

Inferring Aerosol Sources from Low-Cost Air Quality Sensor Measurements: A Case Study in Delhi, India

David H. Hagan et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS (2019)

Add to Collection

Review Respiratory System

Exhaled particles and small airways

B. Bake et al.

RESPIRATORY RESEARCH (2019)

Add to Collection

Article Environmental Sciences

A new method for measurement of air change rate based on indoor PM2.5 removal

P. Y. Ni et al.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (2018)

Add to Collection

Article Construction & Building Technology

Indoor particle dynamics in schools: Determination of air exchange rate, size-resolved particle deposition rate and penetration factor in real-life conditions

Dinh Trinh Tran et al.

INDOOR AND BUILT ENVIRONMENT (2017)

Add to Collection

Article Construction & Building Technology

A comparison between tracer gas and aerosol particles distribution indoors: The impact of ventilation rate, interaction of airflows, and presence of objects

M. Bivolarova et al.

INDOOR AIR (2017)

Add to Collection

Review Environmental Sciences

Review and Extension of CO2-Based Methods to Determine Ventilation Rates with Application to School Classrooms

Stuart Batterman

INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH (2017)

Add to Collection

Article Construction & Building Technology

Field measurement of ventilation rates

A. K. Persily

INDOOR AIR (2016)

Add to Collection

Article Construction & Building Technology

CO2 tracer gas concentration decay method for measuring air change rate

Shuqing Cui et al.

BUILDING AND ENVIRONMENT (2015)

Add to Collection

Proceedings Paper Construction & Building Technology

Test on Ventilation Rates of Dormitories and Offices in University by the CO2 Tracer Gas Method

Weining Zhang et al.

9TH INTERNATIONAL SYMPOSIUM ON HEATING, VENTILATION AND AIR CONDITIONING (ISHVAC) JOINT WITH THE 3RD INTERNATIONAL CONFERENCE ON BUILDING ENERGY AND ENVIRONMENT (COBEE) (2015)

Add to Collection

Review Environmental Sciences

Walking-induced particle resuspension in indoor environments

Jing Qian et al.

ATMOSPHERIC ENVIRONMENT (2014)

Add to Collection

Article Environmental Sciences

Measurement of air exchange rates in different indoor environments using continuous CO2 sensors

Yan You et al.

JOURNAL OF ENVIRONMENTAL SCIENCES (2012)

Add to Collection

Article Construction & Building Technology

Ventilation and dampness in dorms and their associations with allergy among college students in China: a case-control study

Y. Sun et al.

INDOOR AIR (2011)

Add to Collection

Article Engineering, Chemical

Modality of human expired aerosol size distributions

G. R. Johnson et al.

JOURNAL OF AEROSOL SCIENCE (2011)

Add to Collection

Article Engineering, Chemical

Size distribution and sites of origin of droplets expelled from the human respiratory tract during expiratory activities

L. Morawska et al.

JOURNAL OF AEROSOL SCIENCE (2009)

Add to Collection

Review Construction & Building Technology

Experimental investigation of the air flow and indoor carbon dioxide concentration in classrooms with intermittent natural ventilation

M. Santamouris et al.

ENERGY AND BUILDINGS (2008)

Add to Collection

Article Construction & Building Technology

Control of CO2 in a naturally ventilated classroom

M. Griffiths et al.

ENERGY AND BUILDINGS (2008)

Add to Collection

Article Environmental Sciences

The effect of outdoor air and indoor human activity on mass concentrations of PM10, PM2.5, and PM1 in a classroom

M Branis et al.

ENVIRONMENTAL RESEARCH (2005)

Add to Collection

Article Environmental Sciences

Effect of ventilation systems and air filters on decay rates of particles produced by indoor sources in an occupied townhouse

C Howard-Reed et al.

ATMOSPHERIC ENVIRONMENT (2003)

Add to Collection

Article Environmental Sciences

Effects of room furnishings and air speed on particle deposition rates indoors

TL Thatcher et al.

ATMOSPHERIC ENVIRONMENT (2002)

Add to Collection

Article Construction & Building Technology

Characterization of particulate emissions from occupant activities in offices

M Luoma et al.

INDOOR AIR-INTERNATIONAL JOURNAL OF INDOOR AIR QUALITY AND CLIMATE (2001)

Add to Collection

© Peeref 2019-2024. All rights reserved.