Io Hvac Controls HD-BM-NA-1806 Zone Damper 18x6 Bottom Mount

Product Description

The IO HVAC CONTROLS HD-BM-NA-1806 is an 18 x 6 inch two-position zone damper designed for bottom-mount installation in residential and light commercial HVAC zoning systems. This damper ships without an actuator, allowing installers to pair it with a compatible actuator for the specific application. It features a 5/8-to-1/2 inch shaft configuration. Zone dampers control airflow to individual zones within a ducted forced-air system, opening and closing in response to thermostat calls. This unit is suited for rectangular ductwork where bottom-mount access is required and where a separate actuator selection is part of the system design.

This damper is installed in ducted HVAC systems using a zoning control strategy, typically in residential or light commercial settings. It fits inline within rectangular supply or return duct runs. Because no actuator is included, the installer selects and mounts the actuator separately, which allows flexibility when working with different zone control boards or actuator brands. HVAC technicians installing multi-zone systems will use this damper where bottom-mount geometry suits the duct layout and space constraints.

Key Features

• 18 x 6 inch duct opening size for standard rectangular duct applications
• Two-position operation - fully open or fully closed for straightforward zone control
• Bottom-mount design accommodates installations where top or side access is restricted
• Ships without actuator, giving installers flexibility to select a compatible actuator separately
• 5/8-to-1/2 inch shaft configuration for actuator coupling

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for rectangular ducted forced-air HVAC zoning systems requiring a bottom-mount, no-actuator two-position damper in an 18 x 6 inch size.

Installation Notes

Installation should be performed by a licensed HVAC technician. Power down the air handler and all zone control equipment before installing or servicing any zone damper. Ensure the duct opening matches the damper face size before securing the unit, and verify the actuator shaft coupling is compatible with the 5/8-to-1/2 inch shaft before mounting the actuator. Follow all applicable local mechanical codes and manufacturer wiring instructions for the actuator used with this damper.