Io Hvac Controls HD-2018-BM Zone Damper 20x18 Bottom Mount

Product Description

The IO HVAC CONTROLS HD-2018-BM is a rectangular two-position zone damper designed for ducted HVAC zoning systems. Measuring 20 inches wide by 18 inches tall at the duct opening, it uses a 2-wire actuator mounted at the bottom of the damper body to drive the blade between fully open and fully closed positions. This blade-style zone damper is a core component in residential and light-commercial zoning applications where individual rooms or zones require independent airflow control. Licensed HVAC technicians install this damper directly into rectangular duct runs as part of a zone control system managed by a compatible zone control board.

The HD-2018-BM is suited for rectangular supply or return duct installations in residential and light-commercial forced-air systems. The bottom-mount actuator configuration is commonly selected when duct layout limits side or top access. It is engineered for two-position operation, meaning the damper blade is commanded fully open or fully closed based on a zone call, making it appropriate for standard zone control panels that use 2-wire actuator outputs. Install scenarios typically include new zoned system builds and zone damper replacements in existing duct systems.

Key Features

• 20 inch by 18 inch rectangular duct opening for direct inline duct installation
• Two-position operation drives blade fully open or fully closed on zone demand
• 2-wire actuator wiring simplifies connection to compatible zone control boards
• Bottom-mount actuator placement accommodates restricted overhead and side clearance
• Packaged dimensions of 21 inches wide, 25 inches tall, and 8 inches deep for shipping and storage planning

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for rectangular ducted residential and light-commercial forced-air zoning systems using 2-wire two-position actuator control.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with local mechanical codes and manufacturer wiring instructions. Shut down the air handler and de-energize the zone control panel before cutting into the duct and making any wiring connections. The damper must be properly supported and sealed into the duct run to prevent air bypass. Verify actuator wire polarity and zone board terminal compatibility before restoring power to the system.