Io Hvac Controls HD-2820 Zone Damper 28x20 2 Wire

Product Description

The IO HVAC CONTROLS HD-2820 is a rectangular two-position zone damper designed for residential and light commercial HVAC zoning applications. Fitted with a 2-wire actuator, this damper opens and closes to direct conditioned air through individual zones, allowing separate temperature control for different areas of a structure. The blade assembly moves to fully open or fully closed positions, making it well suited for zone control boards and low-voltage thermostat systems. At 12 pounds, the unit is a substantial, duct-ready assembly built for in-line duct installation by HVAC technicians.

This zone damper is intended for rectangular duct systems where airflow needs to be isolated or directed on a zone-by-zone basis. It is a common component in multi-zone forced-air heating and cooling systems in residential construction and light commercial retrofits. The 2-wire actuator simplifies wiring back to the zone control panel, reducing installation complexity in new construction and replacement scenarios alike.

Key Features

• Two-position operation: fully open or fully closed for precise zone airflow control
• 2-wire actuator reduces field wiring complexity
• Rectangular form factor fits standard rectangular duct runs
• Nominal duct size of 28 x 20 inches for high-capacity zone applications
• Sturdy assembly at 12 pounds for durable in-duct mounting

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for rectangular duct HVAC zoning systems that support 2-wire actuator wiring.

Installation Notes

Installation should be performed by a qualified HVAC technician. Shut down the air handler and de-energize the zone control system before installing or replacing the damper. The damper must be mounted in line with the duct run with airflow direction following the manufacturer arrow on the unit body. Verify actuator wiring is compatible with the zone control board voltage requirements before energizing the system.