Comparing the Performance of Conventional Windows and Double Glazed Windows in Building Energy Consumption

In this paper, a building is chosen as a case study and its annual energy consumption and carbon dioxide emissions are calculated. Simulation software (Designbuilder) is employed in this study, where DesignBuilder simulations are applied to enable facade design studies considering building materials, window sizes and orientations. Building loads and wasting heat from various parts of the building are calculated as well. To improve the performance of building, windows replaced with double glazed PVC windows. It was observed that the thermal load of the building in the cold months decline by 46 percent. With the reduction of energy consumption in building, the annual carbon dioxide emission decline by 11 percent.