Double hung windows are made with the top sash slides down and the bottom sash slides up in order to get best air infiltration. Their best feature is that both sashes have the ability to tilt-in and open. It was designed this way to make the outside glass accessible from the inside, making it easy to clean. Double hung windows come with either standard half screen or optional full screen to protect your home from insects while enjoying the fresh air. There are many options available from inside color, outside color and hardware for easy opening or secure protection on locks. Double hung windows are easy to operate, easy to clean and have a tradition look from both the inside and outside. They are energy efficient and their air tight seal makes the double hung window a most popular choice amongst homeowners.