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5.08 Post-occupancy Evaluation for Energy Conservation, Superior IEQ & Increased Occupant Satisfaction

Friday, October 4, 2013
8:00 AM-9:00 AM
Track: Human Factors
Format: General Presentation
Knowledge Level: 100 level
Session Description: Americans spend on average 22 hours a day indoors. As a result, the indoor environmental quality of buildings can have a strong effect on occupants’ productivity and health. IEQ evaluation offers the potential to integrate various aspects of the building, including the building’s physical attributes, indoor environment and occupant satisfaction.

In addition, there is often a significant discrepancy between designed and actual energy use in buildings. One of the reasons for this discrepancy may stem from lack of understanding of human behavior. Post-occupancy evaluation may be the one of the most critical tools to enhance IEQ and occupant satisfaction, while reducing energy consumption. A holistic POE includes collection of field data on IEQ, user satisfaction assessment and recording the technical attributes of the building system.

The traditional POE methodology is tedious and cumbersome.  Simplifying IEQ measurement tools will help POE assessments become a mandatory step in the commissioning of existing buildings and the design of future facilities. The assessment is an important step in the direction of ensuring environmental sustainability and occupant comfort, health and productivity in the construction or renovation of buildings.

This session will outline the various issues related to POE and IEQ assessment methods, and suggest possible steps for simplifying IEQ assessment and tools focused on the building occupants’ and energy conservation perspectives. Significant case studies will be presented for more in-depth investigation. Results from pilot studies of POE assessments using simplified IEQ assessment tools will also be presented.

Learning Objectives:
  • Illustrate key IEQ performance indicators that are important to occupants' health and productivity.
  • Identify IEQ performance indicators that are critical to energy conservation measures.
  • Showcase state-of-the-art IEQ assessment tools and methods.
  • Provide insight into IEQ assessment potentials on building management and operation.
  •     Conference Proceedings



    Jihyun Park
    Carnegie Mellon University
    PhD Candidate
    Center for Building Performance and Diagnostics, School of Architecture

    Jihyun Park is a Ph.D. candidate in the Center for Building Performance and Diagnostics (CBPD) at Carnegie Mellon University (CMU). Her research interests include post occupancy evaluation (POE), indoor environmental quality (IEQ), integrated building energy assessment, and optimization for operation and maintenance. Her doctoral research interests are to develop the building evaluation methods and toolkit to refine field tools for capturing building IEQ, as well as its technical attributes, especially those that may contribute to energy consumption and user satisfaction. Jihyun has worked on several POE and IEQ assessment projects worldwide, including the Bank of America headquarters building in New York, the David Lawrence Convention Center in Pittsburgh, and the Électricité de France (EDF) campus in Paris. She is currently working with the U.S. Department of Energy's Energy Efficient Buildings Hub (EEB Hub) project, which concentrates on accelerating the adoption of advanced energy retrofits of average size commercial buildings. Her task is to develop a toolkit for measuring building energy, IEQ and occupancy satisfaction by refining the Navy Yard Building or other Hub research and demonstration platforms. Jihyun is an architecture designer with professional experience. She has worked on architectural and master plan design for more than 40 projects, including education facilities, office buildings, resorts, residential buildings, medical facilities and government buildings. Jihyun has lectured in several classes in the School of Architecture at Carnegie Mellon University, such as Performance of Advanced Building Systems, Building Controls and Diagnostics, and Special Topics in Building Performance and Diagnostics: Redesigning our Built Environment (2011-2013). She also served as a lecturer in fundamental architecture drawing and design at Seoul National University of Technology, Seoul, Korea (2009).

    Bertrand Lasternas
    Carnegie Mellon University
    Senior Researcher
    Robert L. Preger Intelligent Workplace Laboratory

    Bertrand Lasternas, is a Senior Researcher at the Robert L. Preger Intelligent Workplace Laboratory, Carnegie Mellon University (CMU). Bertrand received his graduate degree in Mechanical Engineering from Paul Sabatier University, France. He is one of the key investigators of the EEBHub project [], an industry/university/national research lab consortium. CMU was awarded $6.25 million from the US Department of Energy to conduct research and demonstration at the Energy Innovation Hub, focusing on developing technologies to make buildings more energy efficient while improving occupant comfort and productivity and at the same time improve indoor environmental quality. In addition to working on EEBHub projects, Bertrand’s other research areas include daylighting and thermal simulation coupling (Trnsys-Daysim), the development of genetic algorithm and test in a thermal-aerolic simulation (Trnsys-Comis), mixed-mode ventilation studies and advance, integrated monitoring, control and optimization for building operations. Bertrand also supports graduate student experimentation in the School of Architecture in the “Building Diagnostics and Controls” course as well as the Master of Science in Sustainable Design synthesis projects. His efforts have become central to the Intelligent Workplace and the Center for Building Performance research and academic agendas. He is critical in the creation of a platform that integrates energy consumption data, indoor environmental quality data, weather data, and mechanical systems control choices for building monitoring, control and optimization. Deeply engaged in energy saving designs and strategies, Bertrand is also certified as a Passive House Consultant.

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