Hinged at the top,
open in the rain
An awning sash swings out from the bottom on a crank. Because the glass tilts out over the opening, light rain and fog drip off the outside instead of coming in, and air still moves through the gap.
Like a casement, it closes against weatherstripping all the way around, so it seals tightly. Awnings are usually wider than they are tall, and they work well on their own or stacked under a picture window.
