The Honeywell ZD22X8 24V Parallel Blade Zone Damper has a durable 24 volt spring return motor that is dependable. It has the basic operation that is simple and very easy to wire. This Honeywell ZD22X8 24V Parallel Blade Zone Damper is compatible with standard and networked zoning. It has fewer blades than the competing models which means it runs smoother and quieter. The Honeywell ZD22X8 24V Parallel Blade Zone Damper has the firm and hard construction using extruded aluminum frame and blades. It has an automatic visual position indicator for damper status and its dimensions are 16 inches x 10 inches damper with the motor on the 10 inches side. It can be mounted on the bottom or at the side of the duct as the application requires. It has a hassle free and a very easy installation. Itâ€™s a 2 wire connection, 90 Deg, Timing Rotation Angle (Sec) 30, with an Ambient Temp Range 40F-140F, its Power Method is 24 Volts, and has the Application Controls of Air Flow in Heating and Cooling Systems.