Welcome

BuildSim Nordic unites researchers, practitioners, educators, and students to exchange ideas, issues, and research findings in the field of building performance simulation. Any research related to building simulation, including system design, HVAC, energy production/use, indoor climate, and environmental issues, is eligible to be presented at the event. BuildSim Nordic 2026 is the 12th BuildSim Nordic conference, and the 4th International Nordic conference for IBPSA, the International Building Performance Simulation Association. The event is open for members and non-members of IBPSA-Nordic and we warmly welcome practitioners from the AEC industry to join us for this exciting opportunity to be updated on the newest ideas and research. Any research related to building simulation, including system design, HVAC, energy production/use, indoor climate, and environmental issues, is eligible to be presented at the event. The event is open for members and non-members of IBPSA-Nordic and we warmly welcome practitioners from the industry to join us for this exciting opportunity to be updated on the newest ideas and research.

Organizing Committee

Thomas Olofsson, Professor Umeå University

Pieter de Wilde, Professor Lund University

Mathias Cehlin, Associate Professor Gävle University

Hatef Madani Larijani, Associate Professor KTH

Patrik Rohdin, Associate Professor Linköping University

Elaheh Jalilzadehazhari, Lecturer Uppsala University

Max Tillberg, Equa AB

Weizhuo Lu, Professor Umeå University

Gireesh Nair, Associate Professor Umeå University

Peng Cui, Associate Professor Nanjing Forestry University

Keynote speakers

Prof. Dr. Kimmo Lylykangas

Kimmo Lylykangas (born 1970 in Helsinki) is Finnish architect who since 2018 works as professor of architecture and the head of Academy of Architecture and Urban Studies at Tallinn University of Technology, Estonia. Currently his research team is working on a variety of greenhouse gas quantification methods and tools that are developed as open source projects. Research interests: greenhouse gas quantification, sustainability in architecture, wood architecture

Prof. Dr. Chengchu Yan

Chengchu Yan is Professor and Dean of the School of Urban Construction at Nanjing Tech University. He serves as the Director of the Youth Committee of the Jiangsu Refrigeration Society, China. He is an editorial board member of the “Journal of Nanjing Tech University”, guest editor for “Sustainability”, and a reviewer for over 10 journals. His primary research areas include green buildings, renewable energy utilization, building simulation and HVAC modelling. He aims to develop effective online calibration and data reconstruction methods for improving the measurement accuracy and data quality of HVAC systems. He has published over 60 papers, including 7 highly cited papers. He holds over 20 patents, has led numerous natural science funds and a series of university-enterprise collaborative projects. He has directed in over 20 building energy-saving diagnosis and retrofitting projects, including the International Commerce Centre (ICC) of Hong Kong and the Beijing Olympic Village’s Low-Energy Demonstration Building. These projects achieved an average energy-saving rate of 20-25%. He was awarded the Second Prize for Scientific and Technological Progress by the China Installation Association in 2022 and the First Prize for Scientific and Technological Progress by the Jiangsu Refrigeration Society in 2023

Associate Prof. Dr. Clayton Miller

Dr. Clayton Miller is an Associate Professor at the National University of Singapore (NUS) in the Department of the Built Environment. He is the creator of the NUS MOOC edX Course – Data Science for Construction, Architecture, and Engineering (https://www.edx.org/course/Data-Science-for-Construction-Architecture-and-Engineering) that has had 30,000+ participants worldwide since April 2020. Dr. Miller’s research focuses on performance data analytics using thousands of real-world case study buildings collected from facilities around the world.

Tuomas Laine

Tuomas Laine, M.Sc. on energy economy, has led development and innovation work for 12 years at Finnish company Granlund Oy. Currently he is working as Senior Advisor. Through his 30+ years of career he and his team have partnered in 11 EU research projects and several Eureka projects. Main R&D&I interests: sustainability, energy efficiency, building information modeling (BIM), Digital Twins, facilities performance management. Heavy involvement on the development of processes and tools utilizing BIM and open standards through the whole building life cycle: from performance analysis and building services design to commissioning and facilities management.

Call for Papers

Contributions
The abstract and paper submission process is handled by Microsoft CMT service.
All authors whose abstract is accepted will be invited to submit a full paper.
We warmly welcome two types of conference papers:
• Scientific Scopus conference papers, recommended length 6-8 pages
• Technical/practical papers, not necessarily applying scientific methods, but presenting case studies, practical applications and project introductions, recommended length 2-4 pages
Both scientific and technical papers will undergo the review process by the scientific committee, however with different criteria. Purely commercial presentations are not accepted.
All accepted papers will be invited to give an oral or poster presentation at the event.
Abstracts
Abstract submission deadline is 5th December 2025.
The abstracts should be:
• Written in English
• No more than 400 words in length
• The abstract format is not required, but it needs to contain title, authors, affiliation, abstract, keywords.
• Submitted via Microsoft CMT service
Templates
Word and Latex templates are available below. You are required to use one of these templates.
Instructions are enclosed in the templates. Please read and adhere carefully to the template instructions as it will speed up the publication process.
Papers must be submitted in English
WordTemplate_BSN2025 (Research paper) (E3S conference series templates)
WordTemplate_BSN2025 (Technical paper) (E3S conference series templates)
LaTeX2e (E3S conference series templates)
Powerpoint template for presentations:
BuildSim25_template.pptx
Presentation submission
Submission link for presentations is https://www.lyyti.in/BSN2025_presentations. Presentation should be submitted the day before presentation time.
Key dates
5th Dec 2025 Abstract submission
15th February 2026 Acceptance of abstracts
1st May 2026 Submission of full paper
1st June 2026 Acceptance of full paper
21st June 2026 Submission of final paper
19-21 August 2026 BUILDSIM NORDIC 2026

Proceedings
Scientific papers will be published in E3S Web of Conferences and indexed in Scopus and other databases including attribution of DOI and indexation to CrossRef.
Technical papers will be published in the Book of Abstracts.
Scientific papers not accepted for E3S will be published in the Book of Abstracts, either in full or in a shortened version (optional).
Book of Abstracts
Technical paper which was not published in the E3S conference series:
Title: Case study: Modelling energy cost savings by utilizing demand response control methods in a residential building equipped with ground-source heat pump system
Authors: Antti Mäkinen, Kari Kallioharju, Aki Kortetmäki
Abstract:This study explores cost-saving strategies in a multi-story residential building through electricity price-based controls, utilizing Nord Pool’s day-ahead market with hourly varying electricity prices (spot pricing). Energy modeling was conducted using IDA ICE software on a building equipped with a ground source heat pump and water-circulating radiators. The study was done in two separate cases (scenarios 1 and 2). In scenario 1 indoor temperatures were lowered by 1-2 degrees Celsius. In scenario 2 the temperature of the two water storage tanks were raised by 5-10 degrees Celsius in response to electricity price fluctuations, resulting in annual energy cost savings of 5.9-7.5% and 1.6-11.2%, respectively. Effects on power distribution cost and specifically effects on power tariff cost were excluded from this analysis.

Registration & Payment

On site registration
18th August 2026 from 2 p.m. till 4 p.m.
UMEA University TEK Building
(Same place as opening ceremony and reception is from 4 p.m. till 6 p.m.)
On-line registration
Early bird tickets at a reduced price are available until 15th December 2025
Last registration date: 28th June 2026
Please login in the Microsoft CMT service system to register.
The conference is physical. We hope to see you for a safe and sunny event in UMEA!
All presenting authors are kindly requested to present their contribution on-site. It will not be possible to present online.
If you have any questions regarding registration, please contact: buildsimnordic2026@ibpsa-nordic.org
Conference fees
Early Bird registration: 500 EUR (Including Sweden VAT) (Until 15th December 2025)
Regular registration: 600 EUR (Including Sweden VAT) (From 16th December 2025)
Conference dinner: 90 EUR
Technical tour: Free
Sunday Reception: Free
For participants, the price includes venue, catering, coffee and snacks on 19-21 August 2026, Sunday reception, technical tour, online access to all papers and publication in Book of Abstracts or E3S proceedings.

Venue & Accommodation

BuildSim Nordic 2026 will be held at the Umeå University campus in Umeå.

Acknowledgement

The Microsoft CMT service was used for managing the peer-reviewing process for this conference. This service was provided for free by Microsoft and they bore all expenses, including costs for Azure cloud services as well as for software development and support.

Contact Us

If you have any questions, please do not hesitate to contact us by the following E-mail address: buildsimnordic-2026@ibpsa-nordic.org