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Window World Double-Hung Window - Window World of Northern California is locally-owned and operated, selling replacement vinyl windows, doors, vinyl siding, and more. Learn more at http://www.windowworldcontracosta.com/
These are Marvin Ultimate double-hung windows that are wood inside, aluminum clad in black which I believe they call ebony.
Ply Gem windows: Pro Series - Vinyl - Plaza or Prairie grill patterns - contact us to get these windows installed if you live in the Minneapolis area. http://www.quarve.com
Andersen A-Series Double-Hung Window, picture window with side double-hung windows example
Double hung windows from Renewal by Andersen let a ton of light into this pretty room.
Double-hung window diagram.
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Andersen® 400 Series Energy Efficient Woodwright® Double-Hung Windows by Andersen Windows, via Flickr