Io Hvac Controls LD-1812-BM Zone Damper 18x12 Bottom Mount

Product Description

The IO HVAC CONTROLS LD-1812-BM is an 18-by-12-inch rectangular two-position zone damper designed for residential and light commercial HVAC zoning systems. It ships with a 3-wire actuator and an integrated LED status indicator mounted at the bottom of the damper body. The unit opens and closes on demand from a zone control board, directing conditioned air through specific duct branches. HVAC technicians install this damper directly into rectangular ductwork where a single zone requires independent airflow control. The bottom-mount actuator position keeps the assembly accessible in tight plenum or attic installations.

This damper is suited for forced-air zoning applications in residential or small commercial ducted systems. It fits into rectangular duct runs that require two-position operation, meaning the blade moves fully open or fully closed based on a thermostat call. The 3-wire control circuit is compatible with standard low-voltage zone control panels. Typical install locations include main trunk branches, bypass duct assemblies, and individual zone branch runs where airflow needs to be isolated per zone demand.

Key Features

• 18-by-12-inch rectangular duct opening fits standard trunk and branch duct sizes
• Two-position operation provides fully open or fully closed airflow control
• 3-wire actuator integrates with standard low-voltage zone control boards
• Integrated LED indicator allows quick visual confirmation of damper status
• Bottom-mount actuator placement improves accessibility in confined installations

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for rectangular ducted forced-air zoning systems using low-voltage 3-wire control wiring.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with ducted zoning systems and low-voltage control wiring. Shut down the air handler and de-energize the zone control panel before installing or replacing the damper. Secure the damper body in the duct using appropriate sheet metal screws and seal all edges with duct mastic or foil-backed tape per local mechanical code requirements. Verify LED indicator operation after wiring to confirm proper actuator response before closing the access panel.