Single Hung Windows are very similar to double hung windows, except for one major difference. On double hung windows both sash in the window frame are operable, meaning they move up and down. The sashes on a double hung window also tilt in for easy cleaning.

On single hung windows, the top sash is fixed in place and does not move or tilt in, but the bottom is operable.

If you live in a dusty area, the double hung window is easier to clean. Though if the windows are going to be on the first floor, cleaning a single hung from the outside may not be an issue.