Patent ID: 8256162

Claim:
A window comprising: a frame having vertical jambs and a sill; a sash having vertical stiles with interior and exterior edges, a bottom rail with interior and exterior edges, and a check rail, the sash being slidable within the frame between a closed position wherein the bottom rail resides adjacent the sill, and an open position, each vertical style being disposed adjacent a respective vertical jamb; first interior seals disposed along the interior edges of the vertical stiles and configured to seal between the vertical stiles and the jambs; a second interior seal disposed along the interior edge of the bottom rail and configured to seal between the bottom rail of the sash and the sill; first exterior seals disposed along the exterior edges of the vertical stiles and configured to seal between the stiles and the jambs, the first interior seals and the first exterior seals of respective vertical stiles at least partially defining respective vertical channels between each of the vertical styles and the adjacent jamb; and a vent communicating between the vertical channels and the environment outside the window to maintain the pressure within the vertical channels substantially the same as the outside pressure.