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Search Publications by: Andrew K. Persily (Assoc)

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Displaying 26 - 50 of 205

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

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

Measurement Science Research Needs for Premise Plumbing Systems

May 11, 2020
Author(s)
Andrew K. Persily, David A. Yashar, Natascha S. Milesi-Ferretti, Tania Ullah, William M. Healy
Premise plumbing systems provide key building services and exist in the context of a range of performance goals related to building energy efficiency, water conservation, reduced environmental impacts, and occupant health and comfort. Pressures to improve

Estimating Interzonal Leakage in a Net-Zero Energy House

November 11, 2019
Author(s)
Lisa C. Ng, Lindsey Kinser, Steven J. Emmerich, Andrew K. Persily
The Net Zero Energy Residential Test Facility (NZERTF) was constructed at the National Institute of Standards and Technology (NIST) to support the development and adoption of cost-effective net zero energy designs and technologies. The 250 m2 two-story

Airflow and Indoor Air Quality Models of DOE Prototype Commercial Buildings

October 24, 2019
Author(s)
Lisa C. Ng, Amy Musser, Andrew K. Persily, Steven J. Emmerich
An previous report, NIST Technical Note 1734, Airflow and Indoor Air Quality Models of DOE Reference Commercial Buildings [1], detailed the CONTAM models of the 16 U. S. Department of Energy (DOE) reference commercial building models. DOE developed the

The Role of Carbon Dioxide in Ventilation and IAQ Evaluation: 40 years of AIVC

October 1, 2019
Author(s)
Andrew K. Persily, William S. Dols, Steven J. Emmerich, Lisa C. Ng
The purpose of this summary is to review Air Infiltration and Ventilation Centre activities, as reflected in its publications, related to indoor carbon dioxide over the 40 years that have transpired since its creation. These activities, like most

Estimating real-time infiltration for use in residential ventilation control

September 19, 2019
Author(s)
Lisa C. Ng, Stephen M. Zimmerman, Jeremy Good, Brian Toll, Steven J. Emmerich, Andrew K. Persily
Minimum outdoor air ventilation rates specified in standards such as ASHRAE Standard 62.2 are generally based on envelope airtightness, building floor area, geographical location, and number of occupants. ASHRAE Standard 62.2 allows for a constant

Estimating real-time infiltration for use in residential ventilation control

June 18, 2019
Author(s)
Lisa Ng, Stephen M. Zimmerman, Jeremy Good, Brian Tool, Steven Emmerich, Andrew Persily
Minimum outdoor air ventilation rates specified in standards such as ASHRAE Standard 62.2 are generally based on envelope airtightness, building floor area, geographical location, and number of occupants. To meet ventilation requirements in practice

IEQ in Green Buildings

August 1, 2018
Author(s)
Andrew K. Persily
As I complete my fifth and final year as chair of SSPC 189.1, Design of High-Performance Green Buildings, indulge me while I reflect on how this standard and other green building programs have dealt with indoor environmental quality. I have spent my 35+

Development of Airborne Nanoparticle Exposure Modeling Tools

July 27, 2018
Author(s)
William S. Dols, Andrew K. Persily, Brian J. Polidoro
Engineered nanoparticles (ENP) are being used in many applications including consumer products. There are many different means by which ENPs may be incorporated into these products (freely- dispersed, embedded, reactive or passive) which can impact the

Ventilation, IAQ and Filtration in a Net Zero Energy House

May 24, 2018
Author(s)
Andrew K. Persily, Lisa C. Ng, Dustin G. Poppendieck, Steven J. Emmerich
The Net Zero Energy Residential Test Facility (NZERTF) was constructed at the National Institute of Standards and Technology (NIST) to support the development and adoption of cost-effective net zero energy designs and technologies. The 250 m2 two-story

IAQ Assessments in High Performing Building

March 5, 2017
Author(s)
Kevin Teichman, Steven Emmerich, Andrew K. Persily
Despite numerous efforts to encourage good indoor air quality (IAQ) in high-performing buildings, including several building rating programs, measured IAQ performance data in high- performing buildings are limited. This presentation summarizes data that