Description
Honeywell MARD-8 — 8″ Round Zone Damper with Floating Actuator
The Honeywell MARD-8 is an 8-inch round zone damper engineered for reliable, precise airflow control in residential and light commercial HVAC zoning systems. Featuring a fully integrated 24Vac floating actuator with power open/power closed operation, this damper delivers positive, fail-safe positioning in both directions — ensuring your zoning system responds accurately to every call from the zone controller.
Power Open / Power Closed Operation
Unlike spring-return dampers that rely on mechanical tension, the MARD-8 uses a true power open/power closed (floating) actuator. This means the damper blade is actively driven to both the open and closed positions under electrical command, providing consistent, dependable performance over the life of the system. The three-wire floating control interface makes wiring straightforward and compatible with a wide range of zone control boards and panels.
Key Features
- 8-inch round duct damper — fits standard 8″ round ductwork
- 24Vac operating voltage — compatible with standard HVAC control systems
- Power open / power closed actuation — positive positioning in both directions
- Three-wire floating actuator — simple, industry-standard wiring configuration
- Integrated actuator design — no separate actuator required
- Suitable for residential and light commercial zoning applications
- Honeywell quality construction for long-term reliability
Application
The MARD-8 is ideal for use in ducted HVAC zoning systems where individual room or zone temperature control is required. It pairs seamlessly with Honeywell and compatible zone control panels, thermostats, and zone boards. Install in supply or return ductwork to modulate airflow per zone demand.
Why Choose the Honeywell MARD-8?
With its robust power open/power closed design, the MARD-8 eliminates the concerns associated with spring-return actuators — no spring fatigue, no partial positioning, and no reliance on duct static pressure to close. HVAC contractors and system designers trust Honeywell zone dampers for their consistent performance, easy installation, and long service life.
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