Investigating the Effect of Distance Between Windows and Floor on Energy Losses in Residential Building Façades by Using Design Builder

Due to high investment costs and long payback period in energy efficiency projects of buildings, careful evaluation is essential before implementing strategies for reducing energy consumption. Saving fossil energy and using clean energy sources for reducing the operating costs of building protect the environment and people’s health. Natural ventilation is one of the factors that affect thermal comfort. The objective of this chapter is to determine the proper distance between the window frames and floor in a house simulated in a moderate climate, which has been studied using library resources and simulation software. The main goal of this chapter is to design an appropriate window for saving energy. This chapter is organized to discuss three models of openings with the distance between the window frames and floor with 70 cm, 90 cm, and 110 cm, using Design Builder software in order to determine the validity of climate models and to compare and examine the airflow rate between the models. These three heights were chosen because they are the most common dimensions applied in residential buildings. The results demonstrate that the airflows in the distance between window frames and floor 90 cm and 110 cm are increased to reach a constant rate and thermal comfort is increased by the same amount. The implication of this study may contribute to designers, planners, and architects and assist them in creating a sustainable built environment.