See the below image for the What is a double hung window diagram. Double-hung windows are a very common window style. You can find double-hung window styles anywhere that windows are sold because this is one of the more popular, sought-after choices available on the market.
And the reason is simple: double-hung windows are easier to clean. Double-hung windows with tilt-in (also called tilt-out) design can be cleaned from inside the house. With single hung windows (and older double-hung windows without tilt-out function), it’s difficult or impossible to clean the outside of the lower sash from indoors.
Instead of having two operable sashes, a single hung is a vertical window that has a fixed upper sash and an operable bottom sash.
What is a double hung window image
