Io Hvac Controls HD-BM-NA-1814 Zone Damper 18x14

Product Description

The IO HVAC CONTROLS HD-BM-NA-1814 is an 18 x 14 inch two-position zone damper designed for bottom-mount installation without an included actuator. It accepts a 5/8 inch or 1/2 inch shaft and controls airflow in residential and light commercial zoned HVAC duct systems. The damper moves between fully open and fully closed positions, allowing zone controllers to direct conditioned air only where it is needed. HVAC technicians install this unit as part of a multi-zone air distribution system, pairing it with a separately sourced actuator that matches the shaft size. The assembly weighs 9.04 pounds and ships in a package measuring 21 x 21 x 9 inches.

This damper is suited for rectangular duct installations in forced-air heating and cooling systems where zoning is required. The bottom-mount configuration positions the actuator mount on the underside of the duct, which is common in horizontal duct runs with accessible lower surfaces. The actuator-free design allows contractors to specify and source the actuator separately, accommodating a range of two-position or spring-return actuators that fit the 5/8 inch or 1/2 inch shaft. It is appropriate for residential zoning projects and light commercial applications where rectangular zone isolation is needed.

Key Features

• Two-position operation for fully open or fully closed airflow control
• 18 x 14 inch duct opening size fits standard rectangular duct sections
• Bottom-mount actuator position suits horizontal duct runs with underside access
• Compatible with 5/8 inch and 1/2 inch actuator shafts for flexible actuator pairing
• Ships without actuator, allowing the installer to match the correct actuator to the zone controller

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for rectangular duct zoning systems requiring a bottom-mount, no-actuator configuration in 18 x 14 inch duct openings.

Installation Notes

Installation is performed by a licensed HVAC technician as part of a zoned forced-air system. Shut down the air handler and de-energize the zone control panel before mounting or wiring any zone damper. Verify the actuator shaft size matches the 5/8 inch or 1/2 inch shaft on this damper before securing the actuator. Follow SMACNA duct construction standards and local mechanical codes for fastening the damper into the duct section.