Comparison of Simplified and Detailed Window Models in Energy Simulations

Martin Thalfeldt, Jarek Kurnitski, Hendrik Voll


The purpose of this study is to quantify the gap between the calculated energy need of a building model with simplified and detailed windows and suggest a method for reducing the gap. We composed a model of a detached house in the cold climate of Estonia and studied its energy needs with triple and quadruple windows. Standard window models resulted in heating need lower by up to 7% and cooling need higher by up to 23%. In case of triple windows multiplying the U-value of standard window models by 1.15 minimized the mismatch in the calculated energy needs with different window models.


Energy simulations; windows; façade design

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DOI: 10.7250/rehvaconf.2015.004


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