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Search Publications by: Andrew K. Persily (Assoc)

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Displaying 51 - 75 of 205

Final Report - Characterization of Emissions from Spray Polyurethane Foam

October 17, 2016
Author(s)
Dustin G. Poppendieck, Andrew K. Persily, Steven J. Nabinger
This report summarizes NIST activities under the FY2013 interagency agreement between the Consumer Product Safety Commission (CPSC) and the National Institute of Standards and Technology (NIST). The objective of that agreement is to develop testing and

Characterizing Indoor Air Quality Performance Using a Graphical Approach

September 14, 2016
Author(s)
Kevin Y. Teichman, Andrew K. Persily, Steven Emmerich
In this paper, we describe and demonstrate an approach to illustrate the performance of buildings with respect to indoor air quality (IAQ). In the absence of an adequate or agreed-upon IAQ metric(s), we describe a graphical approach to presenting IAQ

The Origin and Application of Leakage-Infiltration Ratios

September 13, 2016
Author(s)
Andrew K. Persily, Max Sherman, Benjamin Jones
Infiltration is the ingress of outdoor air under normal operating conditions through adventitious openings located in the façade of a building. The importance of reducing infiltration to save energy is highlighted by standards and building codes in many

How to Evaluate Ventilation in IAQ Studies

July 4, 2016
Author(s)
Andrew K. Persily, Paul Wargocki
Currently, many indoor air quality studies fail to adequately describe ventilation in the space or building being studied. In other cases, ventilation rates are provided with limited or no descriptions of how the measurements were made or no estimates of

Building Systems: Characterization and Impacts OVERVIEW

June 21, 2016
Author(s)
Andrew K. Persily
Characterize three building systems Building envelope, HVAC (heating, ventilating and air-conditioning) and interior surfaces Factors likely to impact the indoor microbiome Known links between systems and indoor microbiome

An Improved Method Of Modeling Infiltration In Commercial Building Energy Models

June 1, 2016
Author(s)
Lisa C. Ng, Steven J. Emmerich, Andrew K. Persily
Different strategies for improving building envelope thermal performance are being implemented in commercial building design and construction as well as being incorporated into ASHRAE standards and other design requirements. The energy impacts of

Carbon Dioxide Generation Rates for Building Occupants

April 18, 2016
Author(s)
Andrew K. Persily, Lilian de Jonge
Indoor carbon dioxide (CO2) concentrations have been used for decades to characterize building ventilation and indoor air quality. Many of these applications require estimates of CO2 generation rates from the building occupants, which are currently based

THE INDOOR ENVIRONMENTAL SIDE OF RESILIENCE

February 1, 2016
Author(s)
Andrew K. Persily, Steven J. Emmerich
NIST is developing a framework to define programs and strategies to increase community-based resilience in the face of a broad range of natural disasters and other extreme events. Many of these events will affect indoor environmental quality either through

Infiltration and Ventilation in a Very Tight Home

September 23, 2015
Author(s)
Lisa C. Ng, Andrew K. Persily, 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. Key design objectives

High Performance IAQ Specification for Net Zero Energy Homes

July 19, 2015
Author(s)
Anthony Bernheim, Alred Hodgson, Andrew K. Persily
The National Institute of Standards and Technology (NIST) constructed a Net Zero Energy Residential Test Facility (NZERTF) to support the development and adoption of cost-effective NZE designs and technologies. Key design objectives include providing

INDOOR ENVIRONMENTAL RESILIENCE: A REVIEW AND DISCUSSION

July 19, 2015
Author(s)
Andrew K. Persily, Steven J. Emmerich
NIST is developing a planning guide to define strategies to increase community-based resilience in the face of a broad range of natural disasters and other extreme events. Many of these events will affect indoor environmental quality (IEQ) either through

Indoor Environmental Resilience: White Paper

July 16, 2015
Author(s)
Andrew K. Persily, Steven J. Emmerich
NIST is developing a framework to define programs and strategies to increase community-based resilience in the face of a broad range of natural disasters and other extreme events. Many of these events will affect indoor environmental quality either through

Modeling Particle Resuspension for Estimating Exposure to Bacillus Spores

June 11, 2015
Author(s)
William S. Dols, Andrew K. Persily
A key challenge in assessing the risks of low level contaminations following biological threat agent releases, and subsequent decontamination, is developing an understanding of and addressing the potential for airborne resuspension of agents that have

Improving infiltration modeling in commercial building energy models

May 15, 2015
Author(s)
Lisa C. Ng, Andrew K. Persily, Steven J. Emmerich
As building envelope performance and HVAC equipment efficiencies are increasingly improved to reduce building energy use, a greater percentage of the total energy loss of a building can occur through envelope leakage. Although the energy impacts of

Indoor Air Quality in High-Performing Building Case Studies: Got Data?

May 12, 2015
Author(s)
Kevin Y. Teichman, Andrew K. Persily, Steven J. Emmerich
In this paper, we review how indoor air quality (IAQ) has been addressed in case studies of high-performing buildings (HPBs), specifically the case studies described in ASHRAE’s “High Performing Buildings” magazine. We find that nearly all of the reported

CONTAM To EnergyPlus Infiltration Features of the CONTAM Results Export Tool

March 30, 2015
Author(s)
Brian J. Polidoro, Lisa C. Ng, William S. Dols, Steven J. Emmerich, Andrew K. Persily
As building envelope performance and HVAC equipment efficiencies continue to be improved to reduce building energy use, a greater percentage of the total energy loss of a building can occur through envelope leakage. Although the energy impacts of

Field Measurement of Ventilation Rates

March 18, 2015
Author(s)
Andrew K. Persily
Ventilation rates have significant impacts on building energy use and indoor contaminant concentrations, making them key parameters in evaluating building performance. Ventilation rates have been measured in buildings for many decades and there are mature