Resideo by Honeywell 12MARD 12" Modulating Round HVAC Damper

The Resideo by Honeywell 12MARD is a 12-inch modulating round damper designed for use in residential and light commercial HVAC zoning systems. This damper provides precise, variable airflow control by modulating to any position between fully open and fully closed, allowing for accurate zone-by-zone temperature management throughout a building.

Key Features:

• 12" Round Duct Size – Fits standard 12-inch round ductwork for straightforward installation
• Modulating Operation – Continuously variable positioning (not just open/close) enables precise airflow balancing across multiple zones
• Resideo / Honeywell Compatibility – Designed to integrate with Resideo and Honeywell Home zoning control systems and panels
• Round Damper Profile – Compact blade design fits within the duct run with minimal obstruction when fully open
• Durable Construction – Built for long-term reliability in forced-air residential and light commercial applications
• Low Leakage Design – Tight blade-to-frame seal minimizes conditioned air bypass when in the closed position

The 12MARD is a key component of a properly designed HVAC zoning system, working in conjunction with a compatible zone control panel and thermostat to deliver conditioned air only to the zones that need it. This reduces energy waste and improves occupant comfort throughout the home or building. Compatible with Resideo's full lineup of zoning accessories and controllers.