The number of windows or doors eligible for rebates is based on the number of rough openings in which windows or doors were replaced. A rough opening is the framed opening of a window or door that may be able to hold one or more windows and/or doors. Each rough opening is counted as one window and/or door. For example, a bay window, which may be made up of several window sections, is regarded as one rough opening. Another example would be a patio or french door, both are regarded as one rough opening.