Io Hvac Controls MBD-10 Manual Balancing Damper 10 in Round

Product Description

The IO HVAC CONTROLS MBD-10 is a 10-inch round manual balancing damper designed to regulate airflow in ducted HVAC distribution systems. The damper uses a locking quadrant mechanism that allows technicians to set a precise blade position and lock it in place, preventing drift during system operation. At 7.45 pounds, the MBD-10 is a solid, duct-ready component suited for installation in round duct branches where permanent airflow balancing is required. Licensed HVAC technicians and sheet metal contractors install this type of damper during new construction, renovation, or system rebalancing projects.

The MBD-10 is used in residential and light commercial forced-air HVAC systems where individual branch circuits need to be balanced to achieve proper static pressure distribution and room-by-room airflow. Typical install locations include main trunk takeoffs, individual room supplies, and return air branches. The locking quadrant allows the installer to dial in the correct airflow percentage and secure the blade without additional hardware. This damper is appropriate for any round duct run requiring manual, non-motorized flow control.

Key Features

• 10-inch round duct size for direct inline installation in standard round ductwork
• Locking quadrant holds blade position firmly once airflow is balanced
• Manual operation requires no wiring, control board, or actuator
• Weighs 7.45 pounds, indicating a durable steel construction suitable for permanent installation
• Non-motorized design simplifies installation and eliminates electrical failure points

Compatibility

Designed as an OEM-style replacement or new-installation component for 10-inch round duct systems in residential and light commercial forced-air HVAC applications.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor. Power down the air handling unit before cutting into any duct section and inserting the damper. The damper blade position should be set during system commissioning after all other ductwork is sealed and the system is running at design static pressure. Refer to applicable mechanical codes such as the International Mechanical Code (IMC) for requirements on balancing damper placement and access.