In an increasingly hotter world, what policies, designs, technologies & behaviours can provide thermal adequacy for coolth?
Buildings and cities have become highly dependent on air-conditioning and mechanical ventilation. Without significant intervention demand for air-conditioning (AC) is projected to rise by 700% by 2050. The implications of an unsustainable increase in cooling demand are being recognised in many countries around the world.
Recent discussions about ‘build back better’ after the Covid-19 pandemic afford an opportunity to reconsider many contemporary practices in the built environment: health and wellbeing, thermal comfort and the agency of building occupants, adaptation to climate change, energy use and environmental impacts, economics and equity, social expectations and demographics, design and innovation, thermal characteristics of buildings and cities. In addition, many countries have stipulated that new buildings must be carbon neutral. Climate change will create an increasingly warmer world – impacting on summer overheating in buildings. This is an urgent concern for both mitigation and adaptation: how can thermal comfort be provided during hotter summers without the GHG emissions? ‘Conventional’ air conditioning will soon be technologically redundant. Can our cities and buildings be designed to have little or no mechanical intervention?
Guest editors: Brian Ford, Dejan Mumovic, Rajan Rawal
This special issue explores alternative approaches to providing thermal comfort and ventilation in different climatic zones across the world at the scales of building, neighbourhood and city. It considers the implications of these alternatives across a range of issues: health, wellbeing, air quality and heat stress; technical / design solutions; social expectations and practices; climate change; policy and regulation; supply chain and procurement; education and training. It includes a range of disciplines: geography, sociology, anthropology, behavioural sciences, architecture, engineering, public health, economics, energy and environmental assessment.
Collectively the papers in this special issue describe a range of viable approaches to ‘alternatives to air-conditioning’ and contribute to an understanding of the opportunities for better informed practice and policy. These alternatives embrace much more than a technological issue: they require holistic design thinking, and include social aspects (expectations, behaviours, practices).
However, the special issue reveals a number of significant gaps which are discussed in the editorial. New pathways to successfully implement alternatives to air conditioning need to be led by policy and regulation, as well as new business models in creating market demand. In this transition to a low carbon future the questions are not just ‘What?’ and ‘Why?’, but primarily ‘How?’. A critical issue will be redefining professional practices, design decision processes, performance standards and capabilities for designing for performance and optimisation processes.
Alternatives to air-conditioning: policies, design, technologies, behaviours (editorial)
B. Ford, D. Mumovic & R. Rawal
transitions in climate control: lessons from the House of Lords
Living with air-conditioning:
experiences in Dubai, Chongqing and London
N. Murtagh, S. Badi, Y. Shi, S. Wei & W. Yu
air-conditioned lives: qualitative insights from Doha
air-conditioning: thermal comfort evaluations
M. Luo, H. Zhang, Z. Wang, E. Arens, W. Chen, F. S. Bauman & P. Raftery
air filtration: optimising indoor air quality and energy
E. Bellas & D. Lucina
overheating in UK homes: is there a safe haven?
P. Drury, S. Watson & K. Lomas
and passive cooling: overheating and air quality in primary schools
D. Grassie, Y. Schwartz, P. Symonds, I. Korolija, A. Mavrogianni & D. Mumovic
Integrating low energy cooling and ventilation strategies in
M. J. Cook, Y. Shukla, R. Rawal, C. Angelopoulos, L. Caruggi-de-Faria, D. Loveday, E. Spentzou & J. Patel
mass for passive cooling and ventilation: adaptive comfort limits, ideal
quantities, embodied carbon
T. de Toldi, S. Craig & L. Sushama
assessment in Passivhaus dwellings: the influence of prediction tools
V. L. Goncalves, V. Costanzo, K. Fabbri & T. Rakha
behaviour and energy: geothermal air-conditioning in a residential development
L. Thomas, A. Woods, R. Powles, P. Kalali & S. Wilkinson
approach to delivering safe, sustainable surgical theatre environments
C. A. Short, A. W. Woods, L. Drumright, R. Zia & N. Mingotti
in New Zealand: power and policy
H. Byrd, S. Matthewman & E. Rasheed
Providing Adequate Thermal Comfort in a Hotter World
Practical Approaches to Cooling: A UK Perspective
J. Godefroy & A. Mylona
Governments' Role in Providing Thermal Adequacy
B. Dean and E.W. Chege
Mapping soft densification: a geospatial approach for identifying residential infill potentials
D Ehrhardt, M Behnisch, M Jehling & M Michaeli
Pilot study to measure the energy and carbon impacts of teleworking
S Simon & W O’Brien
Pandemics and the built environment: A human–building interaction typology
S A Vallis, A Karvonen & E Eriksson
Technological efficiency limitations to climate mitigation: why sufficiency is necessary
Urban expansion: theory, evidence and practice [editorial]
Assessing the influence of neighbourhood-scale vertical greening application
K Gunawardena & K Steemers
Climate action at the neighbourhood scale: Comparing municipal future scenarios
Y Lu, C Girling, N Martino, J Kim, R Kellett & J Salter
Transformational climate actions by cities [editorial]
K R Slater & J B Robinson
Heat stress: adaptation measures in South African informal settlements
J M Hugo
The urban expansion of Berlin, 1862–1900: Hobrecht’s Plan
Common sources of occupant dissatisfaction with workspace environments in 600 office buildings
T Parkinson, S Schiavon, J Kim & G Betti
Governments' Role in Providing Thermal Adequacy
Brian Dean and Elizabeth Wangeci Chege (Sustainable Energy for All) respond to the Buildings & Cities special issue Alternatives to Air Conditioning and explain why thermal comfort is not only a construction industry problem to solve but needs to be placed in the policy agenda on global warming. Thermal adequacy is still not understood as an essential need for human survival and that governments have an essential role.
Developing an Intersectional Approach to Emerging Energy Technologies in Homes
Tom Hargreaves and Nickhil Sharma (University of East Anglia) comment on contributions of the Buildings & Cities special issue Energy, Emerging Technology and Gender in Homes on the role of gender in technology development and the energy transition. This must be broadened further to social justice issues. A failure to do so risks fuelling resistance and pushback to new and emerging energy technologies. Three key avenues for future research and practices for a just energy transition and emerging technologies are set out.