The impact of using Closed Cavity Façades (CCF) on buildings' thermal and visual performance

M. Michael, M. Overend

Research output: Contribution to journalConference articleScientificpeer-review

1 Citation (Scopus)
68 Downloads (Pure)


Glazing is a critical buildings element as it is the most vulnerable envelope part to heat gain and heat loss accounting for around 50% of a building's energy consumption. However, conventional glazing technologies have relatively low-performance characteristics which cause significant heat losses during winter and undesired heat gain in summer. In this regard, this study investigates the thermal and visual performance of various design configurations of a novel glazing technology, named Closed Cavity Façade (CCF), in comparison with traditional glazing technologies. Several CCF configurations were examined using Energy Plus and IDA ICE and compared to the baseline Double Glazing Unit (DGU) (traditional or thermochromic). MATELab, an office-like test facility at the University of Cambridge was used as the model for the simulations, which was beforehand experimentally validated. The results showed extensive benefits of CCFs compared to DGU systems, in terms of thermal performance and comfort. A 22-41% or 21-37% decrease in annual total energy consumption, compared to traditional DGU or thermochromic respectively, are identified along with a positive effect on thermal comfort with a significant reduction in radiant discomfort. Further investigation showed that glass coatings and solar shading device's characteristics play an important role in achieving further performance improvements.

Original languageEnglish
Article number012021
Number of pages9
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2021
Event8th International Building Physics Conference, IBPC 2021 - Copenhagen, Virtual, Denmark
Duration: 25 Aug 202127 Aug 2021


  • Adaptive
  • Closed cavity
  • Double-skin
  • Dynamic
  • Energy efficiency
  • Façade
  • Thermal comfort
  • Visual comfort


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