Advantages - Awning windows are designed to provide light and breeze when placed high on walls. These types of windows are great for bedrooms and other areas that need to maintain privacy but want to allow light in. Awning windows can also be opened slightly to allow ventilation. Advantages - Casement windows are chosen to for their capacity to let in light and fresh air. Casement windows open outward fully, easily allowing fresh air and sunshine into your home. Placement of Casement Window - Casement windows are great for places that will be hard to reach, such as over sinks or appliances.