(under subclass 196) Subject matter comprising a shield or air guiding surface which extends into a flow of natural air (i.e., wind) to direct the air through the window into the ventilated space or to draw air out of the ventilated space.
(1) Note. A mere shield which shelters a window from the wind, but allows air to pass through the window into or out of the ventilated space, is not included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
215, for an air passage between a window sill and sash including a wall sloping downward from the window which may deflect air into or out of the window.
