Double-hung windows are divided into two main sections so that one section can slide up and down past the other one. You can open double-hung windows without consuming exterior space, and with a tilt-wash version, you may never have to go outside to wash windows again.
Instead, the windows come to you. Also, the top sash can be opened for ventilation, providing an extra measure of safety in rooms with children.
Broadview Windows prides itself on carrying double hung windows with three different premium models to choose from.