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Buildings & Construction

Indoor air quality

Search Publications

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  • Published Date
Displaying 51 - 75 of 431

Evaluating Ventilation Performance

January 3, 2022
Author(s)
Andrew K. Persily
The evaluation of building ventilation performance is critical to understanding indoor contaminant transport dynamics and interpreting indoor contaminant measurements. However, ventilation performance involves many different issues and metrics that can

Using CO2 Monitoring to Manage Ventilation in Buildings

November 18, 2021
Author(s)
Andrew K. Persily
The measurement of indoor carbon dioxide concentrations has been used for many years to assess and control building ventilation rates, as well as to characterize indoor air quality. Over the years these applications of indoor CO2 monitoring have been

Critical Capability Needs for Reduction of Transmission of SARS-CoV-2 Indoors

September 30, 2021
Author(s)
Jayne B. Morrow, Aaron Packman, Kenneth F. Martinez, Kevin V. Wymelenberg, Darla Geores, Delphine K. Farmer, Jade Mitchell, Lisa Ng, Yair Hazi, Monica Schoch-Spana, Sandra Quinn, Bill Bahnfleft, Paula Olsiewski
Coordination of efforts to assess the challenges and pain points felt by industries from around the globe working to reduce COVID-19 transmission in the indoor environment as well as innovative solutions applied to meet these challenges is mandatory

Single-Zone Simulations Using FaTIMA for Reducing Aerosol Exposure in Educational Spaces

September 2, 2021
Author(s)
Lisa Ng, Dustin Poppendieck, Brian Polidoro, William Stuart Dols, Steven Emmerich, Andrew K. Persily
On March 11, 2020, the World Health Organization declared the novel coronavirus (COVID-19) outbreak a global pandemic. Following this announcement, school closures around the United States began, and starting in June 2020, many schools decided to reopen

Evaluation of existing infiltration models used in building energy simulation

September 1, 2021
Author(s)
Yeonjin Bae, Jaewan Joe, Seungjae Lee, Piljae Im, Lisa Ng
Infiltration modeling is one of the major sources of uncertainty in building energy simulation. Although many infiltration models exist, their structures and assumptions vary, and many of them are inaccurate for commercial buildings. The use of these

CONTAM RESULTS EXPORT TOOL

May 5, 2021
Author(s)
Brian Polidoro, Lisa Ng, William Stuart Dols
CONTAM is a multizone indoor air quality and ventilation analysis program developed by the National Institute of Standards and Technology (NIST). Since CONTAM simulation files are binary and not human-readable, the CONTAM Results Export Tool was created to

Single-Zone Simulations Using FaTIMA for Reducing Aerosol Exposure in Educational Spaces

April 8, 2021
Author(s)
Lisa Ng, Dustin Poppendieck, Brian Polidoro, William Stuart Dols, Steven Emmerich, Andrew K. Persily
On March 11, 2020, the World Health Organization declared the novel coronavirus (COVID-19) outbreak a global pandemic. Following this announcement, school closures around the United States began, and starting in June 2020, many schools decided to reopen

Protecting Building Occupants from Smoke during Wildfire and Prescribed Burn Events

March 1, 2021
Author(s)
Tom Javins, Gail Robarge, Emily Snyder, Gregory Nilsson, Steven Emmerich
Guideline 44 is in development to provide building measures to minimize occupant health impacts during wildfire and prescribed burn smoke events. In 2020, over 58,000 wildfires occurred in the U.S. alone, burning more than 10 million acres (1). With the

Reference materials for building product emission characterization

December 19, 2020
Author(s)
Dustin Poppendieck, Wenjuan Wei, Mengyan Gong
Building products contain chemical compounds, such as volatile organic compounds, which can be emitted into indoor air and result in human exposures in the indoor environment. The emission rate, commonly measured in environmental chambers, is a key

Assessing Human Exposure to Chemicals in Materials, Products and Articles: A Modular Mechanistic Framework

December 15, 2020
Author(s)
Clara M. Eichler, Ying Xu, Jianping Cao, Charles J. Weschler, Tunga Salthammer, Glenn C. Morrison, Yinping Zhang, Corinne Mandin, Wenjuan Wei, Patrice Blondeau, Dustin Poppendieck, Elaine A. Cohen Hubal, Xiaoyu Liu, Christiaan Delmaar, Antti J. Koivisto, Oliver Jolliet, Hyeong-Moo Shin, Miriam L. Diamond, Chenyang Bi, John C. Little
This paper describes a modular mechanistic framework for predicting chemical emission from indoor sources, partitioning among indoor compartments and exposure to humans present in the indoor environment focusing on semi-volatile organic compounds (SVOCs)

Quit Blaming ASHRAE Standard 62.1 for 1000 ppm CO2

November 15, 2020
Author(s)
Andrew K. Persily
Indoor concentrations of carbon dioxide (CO2) have been widely promoted as metrics of indoor air quality (IAQ) and ventilation, in many cases without a sound understanding or explanation of what they are intended to characterize or adequate discussion of

Characterization of Long-Term Sub-Hourly Thermal Comfort Performance Data

November 1, 2020
Author(s)
Hyojin Kim, Lisa Ng, Brian P. Dougherty, William V. Payne
Current thermal comfort standards do not provide guidelines on how to graphically characterize and benchmark long-term, sub-hourly, thermal comfort. In an effort to address this void, several statistical characterizations and advanced visualization methods

Simulation of controls for reducing aerosol exposure in educational spaces using FaTIMA

September 1, 2020
Author(s)
Lisa C. Ng, Dustin G. Poppendieck, Brian J. Polidoro, William S. Dols, Steven J. Emmerich, Andrew K. Persily
Results from FaTIMA are presented, which is a recently developed, web-based front end to the CONTAM simulation engine, ContamX. We will introduce the model capabilities, user inputs, and results generated. We will then present the use of the tool in
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