vent
the operating portion of a window that swings or projects in or out.
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ventilation latch
hardware which, when extended, restricts the sash opening on a hung or sliding window to a predetermined dimension.
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victorian arch
a roof design imitating the ornamental cascading S-shaped curves associated with a high-end residential conservatory. It also pertains to the decorative arches at the top of the side wall glass lights.
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