Investigation of Different Configurations of a Ventilated Window to Optimize Both Energy Efficiency and Thermal Comfort

Mingzhe Liu, Per Heiselberg, Olena Kalyanova Larsen, Lone Hedegaard Mortensen, Jørgen Rose

Research output: Contribution to journalConference article in JournalResearchpeer-review

11 Citations (Scopus)
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The study in this article investigates 15 ventilated window typologies with different pane configurations and glazing types in climates of four European countries (United Kingdom, Denmark, France and Germany) in order to identify the optimum typology with regard to their energy balance and impact on thermal comfort. Hourly simulations of the heat balances of the windows are conducted on four days representing different typical weather conditions according to the method described in EN ISO 13790. U and g values used in the calculation method are calculated in European software tool (WIS) for the calculation of the thermal and solar properties of commercial and innovative window systems. Additionally, comfort performance is evaluated by inlet air temperature and internal surface temperature of the windows calculated by WIS software.

The results of the study show the energy and comfort performance of different ventilated window typologies and provide optimally ventilated window typologies for climates of these four European climates. The typologies with solar control or Low-emissivity (Low-e) coatings and typologies with double glazing on the outside have better performance in terms of either minimizing the energy consumption or optimizing the thermal comfort. The provided optimal window typologies can be used in residential and commercial buildings for both new constructions and renovations.
Original languageEnglish
JournalEnergy Procedia
Issue numberOctober 2017
Pages (from-to)478-483
Publication statusPublished - 2017
Event11th Nordic Symposium on Building Physics - The Electro Building at Gløshaugen campus, NTNU, Trondheim, Norway
Duration: 11 Jun 201714 Jun 2017
Conference number: 11


Conference11th Nordic Symposium on Building Physics
LocationThe Electro Building at Gløshaugen campus, NTNU
Internet address


  • Ventilated window
  • Configuration
  • Energy consumption
  • Thermal comfort


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