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Outdoor, Large Patio, Porch, Deck, and Wood Patio, Porch, Deck In ARCHITECTUREFIRM’s James River House, the 28-foot-long Series 600 Multi-Slide door is comprised of five 10-foot-tall panels of dual-paned, low-E glass, which helps keep the house warm during Virginia winters. All windows and doors feature thermally broken aluminum. “Western Window Systems,” says architect Danny MacNelly, “does a great aluminum product that isn’t very expensive. The details are minimal, clean, and refined.”  Best Photos from How to Pick the Most Energy-Efficient Windows and Doors