Honeywell 8" x 20" Bottom Mount Rectangular Supply Damper ZD820

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The ZD is a power close, and spring open damper. It has a 24-volt, spring-return, power-closed damper motor used to control circulating air in heating, cooling and ventilating systems. It is used when a normally-open damper is required. The ZD is typically used with the TotalZoneĀ® Systems and other electronic mini-zone damper systems. Powered by the same universal motor as the round ARD damper, these dampers install easily with just two wires and include a reliable, mechanical visual position indicator.


. Kevlar gearing reduces wear, more than doubling damper life.
. Adjustable range stops.
. Mechanical visual position indicator for damper status.
. Solid construction using extruded aluminum frame and blades.
. Parallel blade design for low leakage performance.
. Quieter operation with fewer blades.
. Simple, easy-to-wire, two-wire installation.
. Reliable, strong, 24-volt spring-return motor.
. Fail-safe, normally open operation.
. Compatible with conventional and networked zoning.
. Damper can be installed in any orientation (mounting side can be on either the bottom or the side of the duct).