Objectives of the session

• Create awareness of the need for more systematic review and analysis of reported findings based on best practices from the life sciences
• Start a tradition of explicitly including negative research results in our literature
• Reflect on the need to include other such practices in our community
• Reflect on the effects of confirmation bias on our body of knowledge

Session program

• Introduction. Jelle Laverge, Ghent University, Belgium
• Discussion on need for and potential effect of bias breaking practices in our community, moderated by Iain Walker, LBL, USA

Session chairs

• Jelle Laverge, Ghent University, Belgium
• Iain Walker, LBL, USA

Objectives of the session

• Create an overview of harm budgets attributable to current practices in ventilation and IAQ management in residential buildings
• Discuss the implications of the observed differences and similarities
• Create policy priorities based on this international comparison

Session program

• Introduction: establishing the ASHRAE harm budget. Benjamin Jones, University of Nottingham, UK
• The harm budget in France. Valerie Leprince, CEREMA, France
• The harm budget in Ireland. James McGrath, Maynooth University, Ireland
• The harm budget in Spain. Nuria Casquero-Modrego, LBL, USA
• The harm budget in Belgium. Jelle Laverge, Ghent University, Belgium
• Discussion on implications of the observed differences and similarities, moderated by Iain Walker, LBL, USA

Session chairs

• Jelle Laverge, Ghent University, Belgium
• Iain Walker, LBL, USA

Objectives of the session

• To share key issues and recent approaches in IEQ-centered operation and control in the context of carbon-neutral architecture
• To explore directions for expanding a system-linkage perspective by connecting building operation strategies with distributed energy systems and a prosumer perspective
• To examine the potential and limitations of room-scale ventilation optimization using prediction methods based on data and artificial intelligence
• To discuss how operational strategies informed by occupancy and occupant behavior can reduce unnecessary energy use
• To discuss design and operational considerations from the perspective of IAQ performance evaluation in mechanical ventilation systems

Session program

• Energy Savings via Occupancy-Driven Standby Power Reduction, Min Hee Chung, Kyonggi University
• EnergyPlus-Based Modeling Strategy for a Thermal Energy Prosumer System in a Distributed Energy Network, Seung Hoon Choi, Korea University, South Korea
• Optimal Ventilation Rate Determination in Multi-Family Housing Based on an Indoor CO₂ Concentration Prediction Model, A-Young Kim, Chung-Ang University, South Korea
• Evaluating the Filtration Performance of Mechanical Ventilation Systems with Different Dust Collection Filter Thicknesses, Yong Woo Song, Seowon University, South Korea

Session chairs

• Youngsu Kim, Chung-Ang University, Republic of Korea

Objectives of the session

• Identify and compare the main levers of behaviour change applicable to classrooms
• Present results from field studies and experiments carried out in different climatic and cultural contexts
• Analyze the interaction between technical solutions and human behaviour
• Promote the transfer of scientific knowledge to practice and public policies

Session program

• Introduction and framing, Andrés Litvak, Cerema, France
• Application and behavioural responses to CO₂ feedback devices in classrooms, IAQ in Austrian classrooms, Simon Beck, University of Innsbruck, Austria
• How occupants' daily behaviours and ventilation decisions can matter for educational performance; the new schoolTAIL rating scheme, Pawel Wargocki, Technical University of Denmark, Denmark
• CHALLENG'AIR project: feedback from a regional challenge for improving IAQ in classrooms by occupants. Litvak A., Cerema, France
• Guidelines for ventilation and IAQ in schools: what levers for behavioural changes for occupants?, Pawel Wargocki, Technical University of Denmark, Denmark and Valérie Leprince, Cerema, France

Session chairs

• Andrés Litvak, Cerema, France
• Pawel Wargocki, DTU, Denmark

Objectives of the session

• The objective of this session is to present the overview of the trends in building and ductwork airtightness in 16 countries, as well as further details for three specific countries: Republic of Korea, New Zealand and Chile

Session program

• Overview of the trends in building and ductwork airtightness in 16 countries, Valérie Leprince, Cerema, France
• Building and ductwork airtightness in the Republic of Korea: national trends and requirements, Jae-Hun Jo, Inha University, Republic of Korea
• Building and ductwork airtightness in New Zealand: national trends and requirements, Yu Wang, BRANZ, New Zealand
• Building and ductwork airtightness in Chile*: national trends and requirements, Gilles Flamant, CEDEUS, Chile

Session chairs

• Valérie Leprince, Cerema, France
• Yu Wang, BRANZ, New Zealand

Objectives of the session

• To share recent and ongoing research outcomes on Personalised Environmental Control Systems (PECS) conducted within IEA EBC Annex 87
• To discuss the impacts of PECS on indoor environmental quality (IEQ) and user satisfaction
• To highlight the role of PECS in adaptive and resilient building strategies that respond to climate change and increasing environmental uncertainty
• To foster international research collaboration and interdisciplinary discussion on human-centred indoor environmental control

Session program

• Introduction to IEA EBC Annex 87 and PECS research framework. Bjarne W. Olesen, Technical University of Denmark, Denmark
• A Quantitative Review of the Effects of Personalized Environmental Control Systems (PECS) on the Perception of the Thermal Environment and Air Quality. Jun Shinoda, Technical University of Denmark, Denmark
• Beyond the Threshold: Evaluating Fan Design and the Impact of ASHRAE Standard 55's Air Speed Limit on User and Non-User Thermal Comfort, Joyce Kim, University of Waterloo, Canada
• Thermal-Personality-Based Personalized Environmental Control Systems: Development and Performance Evaluation, Chihye Bae, Jeonbuk National University, Republic of Korea
• Rethinking Personal Environmental Control Systems (PECS) Effectiveness Through Multi-Level Energy Quantification. Dolaana Khovalyg, École Polytechnique Fédérale de Lausanne (EPFL), Switzerland

Session chairs

• Chungyoon Chun, Yonsei University, Republic of Korea
• Chihye Bae, Jeonbuk National University, Republic of Korea

Objectives of the session

• To introduce the design concepts and operational strategies of a Living Lab for integrated indoor air quality management in multi-residential buildings
• To examine indoor pollutant sources, including emerging contaminants such as microplastics, under realistic residential conditions
• To evaluate the role of heating and ventilation systems as active indoor air quality management tools rather than solely thermal or energy systems
• To assess smart ventilation and control strategies within a Living Lab framework for effective indoor pollutant mitigation
• To present practical technological solutions for reducing occupant-related indoor pollutant emissions, particularly from cooking activities
• To discuss how Living Lab–based research can contribute to evidence-based indoor air quality management, building operation, and future standards or policies

Session program

• Design and Operation of a Living Lab for Integrated Indoor Air Quality Management in Multi-Residential Buildings. Ji Woong Kim, Korea Institute of Civil Engineering and Building Technology, Republic of Korea
• Assessment of potential microplastic generation and human health implications from indoor finishing materials under hygrothermal exposure, Ho Hyeon Jo, Yonsei University, Republic of Korea
• Analysis of heating energy performance based on integrated control of radiant floor heating and ERV in Korean residential building. YeEun Kim, Yonsei University, Republic of Korea
• Smart Control Strategies for Heat Recovery Ventilation with Exhaust Fans in Homes. Seung-Rim Lee, Hanyang University, Republic of Korea
• A Breakthrough Solution for Cooking Emission Reduction Powered by DPF Technology. Dae Gon Han, KhanFilter, Republic of Korea

Session chairs

• Yun Gyu Lee, Korea Institute of Civil Engineering and Building Technology, Republic of Korea
• Arnold Janssens, Ghent University, Belgium

Objectives of the session

• To examine whether and under which conditions CO₂ concentration can be considered a meaningful proxy for IAQ-related impacts on cognitive performance and wellbeing
• To critically review existing studies reporting associations between CO₂, IAQ, and cognitive or academic performance
• To discuss methodological strengths, limitations, and sources of uncertainty in current laboratory and field research
• To distinguish clearly between correlation, proxy indicators, and causal inference
• To identify areas of scientific agreement, disagreement, and remaining knowledge gaps
• To support balanced, evidence-based interpretation and communication of research findings to researchers, practitioners, and policymakers

Session program

This session is organised as an Oxford-style debate between two experts—Pawel Wargocki and Benjamin Jones—with the objective of clarifying what current studies collectively indicate, what remains uncertain, and how CO₂ concentration should be interpreted as an IAQ indicator in relation to cognitive performance.

Session chairs

• Valérie Leprince, Cerema, France
• Simon Jones, Air Quality Matters, Ireland

Objectives of the session

This special session presents the first-year research outcomes of a five-year national R&D project supported by the Ministry of Land, Infrastructure and Transport (MOLIT) of the Republic of Korea, entitled "Development of Core Technologies for High-Rise Zero Energy Grade 3 Apartment Buildings." Through this session, six papers will be presented, each addressing key technological and methodological challenges associated with realizing zero-energy performance in high-density residential buildings.

The purpose of this session is to introduce and share the first-year research outcomes of the research consortium and to enhance understanding of the project's overall research direction, methodologies, and preliminary findings among academic and professional audiences.

Session program

• Comparative Analysis of Energy Consumption between ZEB and non-ZEB Apartment Complexes. Chae Lyn Lee, Ewha Woman's University, Korea
• Energy Saving Potential of Central and Individual Integrated Heat Pump System Based on Intermediate Temperature Control. Soo-Jin Lee, Hanyang University, Korea
• A variable U-value–based post-processing method to improve the reproducibility of in-situ measurements of linear thermal transmittance. Seon-In Kim, Inha University, Korea
• Proposal of a Mock-up Test Method for Evaluating Steady-State Linear Thermal Transmittance of Three-Dimensional Building Structures. Chang-Hwan Kim, Korea Conformity Laboratories, Korea
• A Case Study on the Evaluation Criteria and Processes for Overseas Multi-Unit Housing Energy Certification Systems. Ahmin Jang, Korea Conformity Laboratories, Korea
• A Study on Thermal Comfort Optimization of Underfloor Heating Systems Using Individual Heat Pumps for ZEB level 3. Kwang-Ho Ahn, EGen Engineering, Korea

Session chairs

• Jae-Weon Jeong, Hanyang University, Republic of Korea
• Seung-Yeong Song, Ewha Woman's University, Republic of Korea

Objectives of the session

The objective of this session is to provide summary of research on bedroom environment and sleep quality illustrated by a few examples. Additionally, we would like to share the examples of methodologies used during experiments. Finally, the session will discuss the challenges for the future research and implementation including the need for reviewing the standards and developing the retrofit solutions.

Session program

• The importance of sleep and bedroom environment, Pawel Wargocki, Technical University of Denmark, Denmark
• The measurements of sleep quality and bedroom environment, an international group performing the research on sleep quality, Xiaojun Fan, Singapore
• Effects of Localized Body Cooling on Sleep, Kazuyo Tsuzuki, Kansai University, Japan
• PM2.5 and sleep quality, Li Lan, Jiao Tong University, Shanghai, R.P. China
• The experience of research on sleep quality in Malesia, Sheikh Ahmad Zaki, University Technology Malesia, Malesia
• The sleep research in India, Asmita Addya, Indian Institute of Technology, Kanpur, India
• The need for changes in ventilation standards for bedrooms, Anubha Goel, Indian Institute of Technology, Kanpur, India
• Discussion with the audience focusing on the future challenges and retrofit solutions for bedrooms, Pawel Wargocki, Technical University of Denmark, Denmark

Session chairs

• Pawel Wargocki, Technical University of Denmark, Denmark
• Li Lan, Jiao Tong University, Shanghai, R.P. China

Objectives of the session

• To clarify Elsevier's current position and formal policies regarding the use of AI tools in manuscript preparation
• To provide researchers with a framework for selecting journals and tailoring their manuscripts for high-impact outcomes
• To educate authors on the internal mechanics of the peer-review process from the editor's viewpoint
• To share best practices for handling editorial decisions and professional communication during the revision phase
• To foster a dialogue between the publishing industry and building science researchers regarding future trends in scholarly communication

Session program

• Introduction to Elsevier Publishing Frameworks and AI-Related Editorial Policies. Speaker: Ms. Natalia Lee, Senior Publisher, Elsevier
• How to Prepare a Successful Journal Paper Strategically and Navigate the Post-Submission Process. Speaker: Dr. Joon-Ho Choi, University of Southern California (USC)
• Moderated Q&A: Strategies for High-Impact Success. Discussion Panel: Ms. Natalia Lee, Dr. Joon-Ho Choi, and a guest from an Elsevier journal's board member (TBD)

Session chairs

• Joon-Ho Choi, University of Southern California, USA