Skip to main content
Article thumbnail
Location of Repository

Adaptive Comfort Degree-Days: an index to compare adaptive comfort standards and estimate changes in energy consumption for future UK climates

By Charles McGilligan, Sukumar Natarajan and Marialena Nikolopoulou


This paper introduces the concept of the Adaptive Comfort Degree-Day, a temperature difference/time composite metric, as a means of comparing energy savings from Adaptive Comfort Model standards by quantifying the extent to which the temperature limits of the thermal comfort zone of the Predicted Mean Vote Model can be broadened. The Adaptive Comfort Degree-Day has been applied to a series of climates projected for different locations (Edinburgh, Manchester and London) under different emissions scenarios in the United Kingdom for the 2020s, 2030s, 2050s and 2080s. The rate at which energy savings can be achieved by the European adaptive standard EN15251 (Category II) was compared with the ASHRAE 55 adaptive standard (80% acceptability) during the cooling season. Results indicate that the wider applicability of the European standard means that it can realise levels of energy savings which its counterpart ASHRAE adaptive standard would not achieve for decades

Topics: NA, TA
Publisher: Elsevier
Year: 2011
OAI identifier:

Suggested articles


  1. (2005). (British standards Institution),
  2. (2008). A handbook of adaptive thermal comfort – towards a dynamic model. London: Low Energy Architecture Research Unit,
  3. (2000). A Standard for Natural Ventilation.
  4. (2007). Adaptive Comfort Applications in Australia and Impacts on Building Energy Consumption. In:
  5. (2010). Changes in internal temperatures within the built environment as a response to a changing climate. doi
  6. (2010). Climate Impacts Programme),
  7. (2010). Climatic Research Unit, unknown date. The Climatic Research Unit [online].
  8. (2010). Constructing a future weather file for use in building simulation using UKCP09 projections. doi
  9. (2008). Cutaneous differences between Black, African or Caribbean Mixed-race and Caucasian women: biometrological approach of the hydrolipidic film. doi
  10. (2010). Derivation of the adaptive equations for thermal comfort in freerunning buildings doi
  11. (1998). Developing an adaptive Model of Thermal Comfort and Preference. doi
  12. (2002). Differences in perception of indoor environment between Japanese and non-Japanese workers. doi
  13. (2000). Effects of measurement and formulation error on thermal comfort indices in the ASHRAE database of field studies.
  14. (2006). Institution of Building Services Engineers), doi
  15. (2010). Met Office climate prediction model: doi
  16. (2000). Panel on Climate Change), doi
  17. (2004). Society of Heating, Refrigerating and Air-Conditioning Engineers, doi
  18. (2002). Thermal comfort in naturally-ventilated buildings: revisions to ASHRAE standard 55. Energy and Buildings, doi
  19. (1972). Thermal Comfort. (American edition) Copenhagen:
  20. (2009). UK Climate Projections, doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.