The bi-fold, sliding doors from the kitchen, and the adjacent living room, open up to the outdoor space. I don't recall the manufacturer. A few I know of are: Panda Doors and Lanai Doors. I hope this helps.

@Luxe Interiors Thanks for the mention. We have an entire gallery of B-Fold Doors please check it out http://www.panda-windows.com/products/by-type/folding-doors.