A window plays a crucial role in each room. In order to give the perfect air circulation in the bathroom, it will be better to add the window in such room as the bathroom. The existence of window in the bathroom is helpful to bring the fresh air inside the bathroom when it opens, thus it will not be musty. Another benefit is through the bathroom window, the bathroom will be brighter so that it will minimize the use of lighting in the day. This is as the result of the sunlight that comes into the bathroom. The sunlight is beneficial to add the natural illumination from the outside. By applying the bathroom window, the house owners can save the budget since they do not need to spend more money each month to pay the electricity.