Patent ID: 9062490
Filing Date: 2015-06-23
Classification: E06B

Abstract:
1. A window for reducing moisture entry due to pressure differentials, the window having an interior side for facing toward an interior of a structure in which the window is installed and an exterior side for facing toward an exterior of a structure in which the window is installed, the window comprising: a window frame including a first jamb, a second jamb, a header, and a sill, the sill defining a bottom surface for placement on or adjacent a bottom frame member of a rough opening and defining a maximum sill height as measured from the bottom surface of the sill to a top surface of the sill, the sill forming a transition channel at least partially defined by a front surface, a bottom surface, and a back surface, wherein the bottom surface includes a sloped portion that slopes downwardly towards the front surface, and wherein the front surface is configured to transmit moisture out of the channel; an active sash that is moveable with respect to the window frame between an open position and a closed position, the active sash having a first side, a second side, a top, and a bottom; a primary sill seal configured to contact the sill and the sash when the sash is in the closed position to form a substantially water-proof and substantially air-tight seal; and a secondary sill seal configured to contact the sill and the sash when the sash is in the closed position to form an air-permeable water barrier, the primary sill seal and the secondary sill seal being arranged about the transition channel such that the transition channel exhibits a pressure substantially corresponding to an exterior of a structure in which the window is installed even when an interior of the structure and the exterior of the structure exhibit a pressure differential.