Casement windows are a good choice where light and fresh air are a priority. They crank outward to catch the breeze and seal tight to keep out foul weather. The awning style is a popular choice for horizontally-styled homes such as Prairie and Ranch styles. Casement and awning windows offer superior energy efficiency and maximize ventilation opportunities. They can be used on their own or combined with fixed or picture windows (or other casements) to create the configurations you desire to make your home the brightest and airiest it can be.