An aluminum double-hung window consists of two movable sashes that slide up and down within the frame. The sashes can be tilted inwards for easy cleaning. The aluminum frame is lightweight yet sturdy, offering excellent resistance to corrosion and weathering. The window typically includes weatherstripping for enhanced insulation, and it can be fitted with various types of glass, such as low-E coatings for energy efficiency. The design allows for versatile ventilation and is often chosen for its modern appearance and minimal upkeep.