A sliding window for use in an opening in a supporting structure. The window comprises a plurality of glazing materials, an interior trim ring, and a housing having a plurality of tracks and at least one drain passage connecting each track to a surface on the housing. The drain passages are positioned downwardly from each track through the housing to a position on the surface of housing which is in fluid communication with an exterior environment. The components that comprise the window frame that holds the glazing materials can be economically produced from a unitary blank. The vertical orientation of the drain passages limits the possibility that the passages will become blocked, and thus unable to drain the water from the tracks. Furthermore, each drain passage connects the track directly to the exterior environment to avoid the possibility of one drain passage becoming blocked and urging water back into another track.