Io Hvac Controls HD-NA-2812 Zone Damper 28x12 No Actuator

Product Description

The IO HVAC CONTROLS HD-NA-2812 is a two-position zone damper sized at 28 x 12 inches, supplied without an actuator and fitted with a 5/8-inch to 1/2-inch shaft. Zone dampers control airflow to individual zones in a ducted HVAC system, opening and closing on command from a zone controller or thermostat. This damper ships actuator-ready, allowing the installing technician to select and mount the actuator that suits the control system already in use. At 11.04 pounds, the unit is built for conventional rectangular duct installations in residential and light-commercial zoning applications.

This damper is intended for two-position zoning systems where supply air is directed to or blocked from a specific zone. It fits into standard rectangular ductwork and is installed in-line between the air handler and the zone diffusers. HVAC technicians adding or expanding a zoning system will pair this damper with a compatible actuator and a zone control board. The no-actuator configuration is especially useful when retrofitting existing duct runs or when standardizing actuator selection across a multi-zone job.

Key Features

• Two-position operation for straightforward open/closed zone control
• Supplied without actuator, giving technicians flexibility to select the appropriate actuator for the control system
• 5/8-inch to 1/2-inch shaft accommodates a range of compatible actuators
• 28 x 12 inch damper face sized for standard rectangular duct runs
• 11.04-pound construction suitable for in-duct installation in residential and light-commercial systems

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for two-position rectangular duct zoning systems in residential and light-commercial HVAC applications.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with ducted zoning systems. Power down the air handler and zone control panel before beginning any duct or wiring work. The damper must be mounted in-line in the supply duct with adequate clearance around the shaft for actuator mounting and operation. Secure all duct connections per local mechanical codes before restoring power and commissioning the zone system.