Honeywell ZD12X16/U 12 inch x 16 inch 24 Volt Bottom Mount Parallel Blade Automatic Zone Damper Honeywell Item SKU - ZD12X16/U EDP - 685334 Out of stock Old Number ZD12X16 Power close and spring open damper - 24 volt motor used to control circulating air in HVAC systems and used when a normally open damper is required. Mechanical visual position indicator for damper status - Solid construction using extruded aluminum frame and blades Parallel blade design for low leakage performance - Simple, easy to wire, two wire installation - Reliable, strong, 24-volt spring return motor. Fail safe, normally open operation Login for Your Price