The IOT can coordinate PCS & HVAC systems to improve energy efficiency.
Joyce Kim (University of Waterloo) explains key findings and lessons arising from a Personal Comfort Systems field study using the Internet of Things. Key questions addressing the next steps for widespread adoption are posed.
Part of a a new series on Personal Comfort Systems: How barriers to this promising approach can be overcome.
Sabine Hoffmann (Technical University of Kaiserslautern) explains how an office chair with heating and cooling was developed and commercialised.
First in a new series examining how barriers to this promising approach can be overcome.
Ed Arens and Hui Zhang (Center for the Built Environment, University of California, Berkeley) introduce a series of commentaries that explore the development and adoption of personal comfort systems: decentralized building thermal control, in which occupants control their local environments with personal devices while the amount of central space conditioning (HVAC) is scaled back. This has been shown to improve thermal satisfaction and reduce energy demand. What are the barriers to its implementation?
How might an author choose an appropriate publisher and what are some of the processes involved in creating a book?
Philip Steadman (University College London) has authored a dozen books over 50 years. Reflecting on his own experiences, he offers some advice to new authors planning to publish books about architecture and building.
First published in 1964 and based on his doctoral thesis, this book puts forward a systematic method for designing products, buildings or settlements.
Philip Steadman (University College London) revisits and critiques this influential book by Christopher Alexander (1936-2022). Its method relies in part on the mathematics of set and graph theory, together with a computer technique for analysing complex systems and dividing them into their component sub-systems.
The Cartesian mechanistic worldview is essentially unable to create living cities. Lessons about connections can help to make cities more sustainable.
Bin Jiang (University of Gävle) reflects on Christopher Alexander's (1936-2022) pursuit of living environments with a recurring notion of far more small substructures than large substructures.
Viable alternatives exist to reduce the use of concrete in construction.
Does concrete have to be used widely? Given the large amounts of GHGs generated by concrete, what alternative materials and design optimisations exist? Ronita Bardhan (University of Cambridge) and Ramit Debnath (University of Cambridge) discuss some options for how we can immediately reduce concrete consumption.
Concrete has been used as a lazy solution for every problem in the built environment. We can reduce our dependency and use of concrete.
After water, concrete is the most widely used substance on earth. The huge environmental burden of concrete is generally assumed to be necessary, and much research is being devoted to reducing the carbon costs of manufacture. Robyn Pender argues we should ask deeper questions: How much do buildings truly require concrete? And do we deploy it wisely?
Are standards promoting air conditioning and marginalising natural ventilation?
Current codes are making buildings more reliant on air-conditioning at the expense of natural ventilation and other cooling solutions. Adam Rysanek (University of British Columbia) explains why this should be countered. Revolutionising codes in a manner that widens the responsibility of architects and engineers to deliver IEQ is urgently needed in advance of future public health crises and the climate emergency.
What is needed to make today's buildings zero-carbon ready?
The urgency to radically reduce primary energy consumption and greenhouse gas (GHG) emissions during the life cycle of buildings is undisputed. The ultimate goal is a building stock which does not rely upon GHG emissions and compensates for any remaining emissions using effective and acknowledged measures (Lützkendorf & Frischknecht 2020). Thomas Lützkendorf (Karlsruhe Institute of Technology) and Rolf Frischknecht (Treeze Ltd) explore the implications for making buildings now that are zero-carbon-ready.
Cross-laminated timber is a promising low-carbon structural solution. Research into its service life will create confidence and improve its competitiveness.
Ambrose Dodoo, Michael Dorn, Anders Olsson, Thomas K. Bader (Linnaeus University, Sweden) explain the potential of cross-laminated timber (CLT). This relatively new building technology makes it possible to construct tall wood-frame multi-storey buildings. However, the current generation of CLT-based buildings have yet to reach mid-service life. Accordingly, CLT is a subject of growing research to address open issues related to material efficiency, construction and connections, long-term structural performance and life cycle climate impacts. Efficient structural engineering design and solutions present opportunities to reduce the carbon footprint of CLT buildings.
Past research on housing is still relevant to today's research and policy agendas.
The issues of how housing can be adaptable are not new. Construction historian Andrew Rabeneck reflects on research and practice from the 1970s that should be included in current conversations. Several different strategies exist: Limited Flexibility, Full Flexibililty, Build On (at a later date), Build In (at a later date), Adaptability (through the provision of extra space). One of the simplest and least cost options is the enhanced space provision i.e. an increase in room areas of up to 10% and looseness of fit - allowing 'occupant choice through ambiguity', with minimum predetermination of patterns of use.
Were the needs and demands of cities and local governments marginalised in their roles and representation at COP26?
The 26th UNFCCC
Conference of Parties (COP26) in Glasgow represented a decisive moment in
history. Five years after Paris, it was a moment of reckoning - had countries
delivered on their promises? It was also the last chance for political leaders
to raise GHG reduction targets to prevent global warming above 1.5 oC. Linda Westman (University of Sheffield) reflects on COP26 and the prospects for cities and local governments.
By Harpa Birgisdóttir (Aalborg University Copenhagen, DK)
Building regulations are important drivers for change. They have been focused on reducing the operational energy in buildings. This is now changing in some countries as evidence shows the significant amount of embodied emissions in construction materials. Additional new requirements are setting targets for embodied carbon in buildings and whole-life carbon assessments in order to decarbonise the built environment. Regulations are being implemented in Netherlands, France and Denmark, and planned in Finland and Sweden.
By Jane Anderson (ConstructionLCA, UK)
Although COP26 is focused on actions by state governments, their commitments are often underpinned by industry. The complexity of embodied carbon in buildings depends on regulation and standards, manufacturer compliance, professional engagement and clear methods / data. We must raise embodied carbon literacy and capabilities across the construction industry to expedite readiness for regulation. Several steps are required and some are already underway.
By Sonja Klinsky (Arizona State University, US) and Anna Mavrogianni (University College London, UK)
COP26 provides an opportunity to reflect on how the built environment community can facilitate deeper efforts towards adequate climate justice actions. Although the focus during COP26 will be on state governments, their commitments depend on consistent efforts pursued by non-state actors. Climate justice requires commitment from the built environment community who are obliged to act in the public interest. Opportunities are suggested for key actors that are well-placed to contribute to these efforts: universities and higher education, professional associations and local authorities.
By Timon McPhearson (The New School, US)
Natural infrastructure is a critical urban infrastructure that provides fundamental and irreplaceable services for human health, wellbeing, and livelihoods. Urban development must quickly shift away from the dominant 20th century model that exacerbates hazards and risks by paving over urban ecological infrastructure. Firm commitments at COP-26 are needed to radically increase investments in nature-based solutions in cities: restoring, conserving and investing in green and blue infrastructure assets. This will reduce the impacts of climate change as part of an adaptation strategy and also improve wellbeing.
By Linda K. Westman (University of Sheffield, UK)
Will cities play a key role at COP26 in Glasgow? This commentary examines three arguments about the importance of cities in delivering effective global climate action. Each argument is developed in relation to the negotiating position and political strategy of the UNFCCC Local Government and Municipal Authority (LGMA) constituency (LGMA, 2019).
By Jason Corburn (University of California, Berkeley, US)
The overlapping crises of climate change, COVID-19, and persistent social inequities are acutely felt in cities, particularly among the poor and already vulnerable. Urban climate justice demands a focused strategy to support the healing of these vulnerable communities while also creating new opportunities for them to co-lead more equitable climate resiliency strategies. COP-26 must address 'healing cities for climate justice;' or the need for urgent investments with (not on or for) already vulnerable people and places in order to eliminate existing suffering and urban traumas, while also planning for future prosperity.
By Thomas Lützkendorf (Karlsruhe Institute of Technology, DE), Ursula Hartenberger (PathTo2050, BE), York Ostermeyer (Chalmers U, SE)
COP-26 is about showcasing action and replicable, practical solutions that will accelerate market transformation. Climate action must become incorporated into the regular activities of the construction and real estate sectors. The way to achieve this is to incentivise a systematic and transparent approach to building-related information which can accelerate and reward stakeholder action. The building passport can accomplish this by creating a "living document". In first instance, governments should set an example by making building passports mandatory for public buildings and then consecutively roll it out across other building typologies and market segments.
Beyond the building: governance challenges in social housing retrofit
H Charles
Heat stress in social housing districts: tree cover–built form interaction
C Lopez-Ordoñez, E Garcia-Nevado, H Coch & M Morganti
An observational analysis of shade-related pedestrian activity
M Levenson, D Pearlmutter & O Aleksandrowicz
Learning to sail a building: a people-first approach to retrofit
B Bordass, R Pender, K Steele & A Graham
Market transformations: gas conversion as a blueprint for net zero retrofit
A Gillich
Resistance against zero-emission neighbourhood infrastructuring: key lessons from Norway
T Berker & R Woods
Megatrends and weak signals shaping future real estate
S Toivonen
A strategic niche management framework to scale deep energy retrofits
T H King & M Jemtrud
Generative AI: reconfiguring supervision and doctoral research
P Boyd & D Harding
Exploring interactions between shading and view using visual difference prediction
S Wasilewski & M Andersen
How urban green infrastructure contributes to carbon neutrality [briefing note]
R Hautamäki, L Kulmala, M Ariluoma & L Järvi
Implementing and operating net zero buildings in South Africa
R Terblanche, C May & J Steward
Quantifying inter-dwelling air exchanges during fan pressurisation tests
D Glew, F Thomas, D Miles-Shenton & J Parker
Western Asian and Northern African residential building stocks: archetype analysis
S Akin, A Eghbali, C Nwagwu & E Hertwich
Lanes, clusters, sightlines: modelling patient flow in medical clinics
K Sailer, M Utley, R Pachilova, A T Z Fouad, X Li, H Jayaram & P J Foster
Analysing cold-climate urban heat islands using personal weather station data
J Taylor, C H Simpson, J Vanhatalo, H Sohail, O Brousse, & C Heaviside
Are simple models for natural ventilation suitable for shelter design?
A Conzatti, D Fosas de Pando, B Chater & D Coley
Impact of roofing materials on school temperatures in tropical Africa
E F Amankwaa, B M Roberts, P Mensah & K V Gough
Acceptability of sufficiency consumption policies by Finnish households
E Nuorivaara & S Ahvenharju
Key factors for revitalising heritage buildings through adaptive reuse
É Savoie, J P Sapinski & A-M Laroche
Cooler streets for a cycleable city: assessing policy alignment
C Tang & J Bush
Understanding the embodied carbon credentials of modern methods of construction
R O'Hegarty, A McCarthy, J O'Hagan, T Thanapornpakornsin, S Raffoul & O Kinnane
The changing typology of urban apartment buildings in Aurinkolahti
S Meriläinen & A Tervo
Embodied climate impacts in urban development: a neighbourhood case study
S Sjökvist, N Francart, M Balouktsi & H Birgisdottir
Environmental effects of urban wind energy harvesting: a review
I Tsionas, M laguno-Munitxa & A Stephan
Latest Commentaries
Will NDC 3.0 Drive a Buildings Breakthrough?
To achieve net zero GHG emissions by mid-century (the Breakthrough Agenda) it is vital to establish explicit sector-specific roadmaps and targets. With an eye to the forthcoming COP30 in Brazil and based on work in the IEA EBC Annex 89, Thomas Lützkendorf, Greg Foliente and Alexander Passer argue why specific goals and measures for building, construction and real estate are needed in the forthcoming round of Nationally Determined Contributions (NDC 3.0).
Self-Organised Knowledge Space as a Living Lab
While Living Labs are often framed as structured, institutionalised spaces for innovation, Sadia Sharmin (Habitat Forum Berlin) reinterprets the concept through the lens of grassroots urban practices. She argues that self-organised knowledge spaces can function as Living Labs by fostering situated learning, collective agency, and community resilience. The example of a Living Lab in Bangladesh provides a model pathway to civic participation and spatial justice.