The modern elegance of a sliding window is an ideal solution, particularly when a projecting window might interfere with walkways, patios, decks, or landscaping. From a functional standpoint, the sash open easily, both sides of the window are operational, and they lift out of the track for quick cleaning.
†Exterior of glass only, when activated by sunlight. A study of identical homes comparing Low-E to ordinary dual-pane glass showed a 25% savings on cooling bills, 10% on heating. Savings may vary geographically.