Manufacturers produce single hung windows and accompanying frames which can simply be dropped into place, and it is also possible to purchase the windows as standalone items to fit in an existing frame. The primary advantage to this window design is that it can be significantly less expensive than a double hung window or other designs. The lower cost may be viewed as an acceptable tradeoff for some of the inconveniences associated with a single hung window.
With a sing hung window, the outside of the fixed upper sash cannot be reached from the inside for cleaning, which can be inconvenient. On the ground level, it may be relatively easy to clean the window, but windows on higher floors necessitate access with a ladder. The fixed sash also limits options in terms of ventilation, as people cannot lower the upper sash to allow air to flow across the upper part of the room.
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