The 140 Series Hung Window employs a vertical sliding structure equipped with a self-balancing counterweight system and low-friction rollers, enabling independent opening and closing within a single sash frame and allowing the window to remain securely suspended at any position. The frame is constructed from multi-chamber thermally broken aluminum profiles, combined with triple-glazed insulating glass and warm-edge spacer bars, achieving a whole-window thermal transfer coefficient as low as 1.3 W/(m²·K) to enhance building energy efficiency. The system comes standard with concealed wind-resistant locks and removable screens, featuring a dual-sided cleaning design to meet both high-rise safety regulations and ease of daily maintenance. Options include manual cranks, chain drives, or motorized smart controls, making it suitable for residential, educational, healthcare, and other building environments with stringent requirements for ventilation control, energy efficiency, and operational safety.