Io Hvac Controls HD-2212-BM Zone Damper 22x12 2 Wire Bottom Mount

Product Description

The IO HVAC CONTROLS HD-2212-BM is a rectangular two-position zone damper designed for ducted HVAC zoning systems. Measuring 22 inches wide by 12 inches tall, it uses a 2-wire actuator mounted on the bottom of the unit to control airflow through a single zone. When the zone calls for conditioning, the actuator opens the damper blade; when the call is satisfied, it closes. This straightforward open/close operation makes the HD-2212-BM a reliable choice for residential and light commercial zoning installations where variable airflow control is not required. Licensed HVAC technicians and sheet metal contractors are the primary installers.

This damper is suited for rectangular duct zoning applications in forced-air systems, including single-stage and multi-stage gas, heat pump, and air handler setups. The bottom-mount actuator configuration is well-suited for installations where side or top access to the actuator is restricted by duct routing or structural clearances. It is typically installed inline within supply duct runs as part of a multi-zone control system paired with a compatible zone control board and thermostat.

Key Features

• 22 x 12 inch rectangular duct opening fits standard supply duct sizing
• Two-position operation provides reliable fully open and fully closed airflow control
• 2-wire actuator simplifies field wiring and reduces installation time
• Bottom-mount actuator placement accommodates restricted-access duct installations
• Designed for inline supply duct installation in residential and light commercial zoning systems

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for rectangular ducted forced-air HVAC zoning systems requiring a 22 x 12 inch two-position damper with a 2-wire actuator.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor in accordance with local mechanical codes and ACCA zoning guidelines. Disconnect power to the air handler or furnace and de-energize the zone control board before wiring or positioning the damper in the duct. The damper must be oriented so the bottom-mount actuator remains accessible for future service. Verify blade direction and airflow arrow alignment before securing the unit to the duct.