The ARD is a round damper with a 24 Vac, spring-return damper motor used to control circulating air in heating, cooling, and ventilating systems. The damper is shipped as a powered closed/spring return open damper for use with the TotalZone Damper System, Electronic MiniZone Damper System and other normally open damper systems.
The damper can be field-converted to a power open/spring return closed damper when used as an independent zone or for fresh air intake for ventilation or combustion make-up air.