Io Hvac Controls HD-2818 Zone Damper 28x18 2 Wire

Product Description

The IO HVAC CONTROLS HD-2818 is a rectangular two-position zone damper with a 2-wire actuator, designed to regulate airflow in ducted HVAC zoning systems. The damper measures 28 x 18 inches and is built for duct installation where zone-by-zone temperature control is required. With a two-position actuator, the damper moves fully open or fully closed based on zone demand signals. Licensed HVAC technicians install this damper as part of a multi-zone forced-air system, typically alongside a zone control board and individual thermostats. It weighs 10 pounds and ships as a single unit.

The HD-2818 is suited for residential and light commercial forced-air zoning applications where rectangular duct geometry requires a damper in the 28 x 18 inch size range. It is installed inline within supply duct runs to isolate individual zones. The 2-wire actuator simplifies low-voltage wiring back to a zone control panel, making it a practical choice for new zoning installations or replacements in existing systems where the duct opening matches the nominal damper dimensions.

Key Features

• Two-position operation: fully open or fully closed for straightforward zone control
• Nominal damper size of 28 x 18 inches fits standard rectangular duct openings
• 2-wire actuator reduces low-voltage wiring complexity at the zone panel
• 10-pound assembled weight suitable for standard duct support methods
• Designed for inline duct installation in forced-air zoning systems

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for forced-air HVAC systems requiring a rectangular two-position damper in a 28 x 18 inch nominal duct opening.

Installation Notes

Installation should be performed by a licensed HVAC technician. Shut down the air handling unit and de-energize the zone control system before installing or replacing the damper. The damper is installed inline in the supply duct and secured according to sheet metal ductwork best practices; low-voltage wiring to the actuator should comply with NEC guidelines for control wiring. Do not force the blade manually while the actuator is energized.