You can’t get more traditional than this classic window style. Both top and bottom sashes open. To encourage lots of air circulation, open both sashes halfway. On double hung tilt windows, the sashes tilt inward to enable easy cleaning of the exterior faces of both the top and bottom sash.
Since double hung windows open without using any interior or exterior space, they’re an excellent choice for small rooms or next to walkways, porches or patios where you don’t want a window to protrude. Double hung windows can be an effective design element for ventilation when combined with picture or arch/radius windows. They’re frequently used in bedrooms, bathrooms and many other rooms in a house.