The HVAC Zone Damper is a professional grade, heavy-duty motorized damper designed for commercial and industrial use. Made in the USA, this 12" round damper features a power open - power close pattern and operates on 24VAC voltage. The DSUP10 model is designed for efficient control of heating, ventilation, and air conditioning systems, providing reliable performance and energy savings. With a compact size and lightweight design, this motorized damper is a crucial component for any HVAC system requiring precise control and operation. New, open box, never installed, with all hardware included.