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The IO HVAC CONTROLS D-Z1-2618 is a two-position zone one damper assembly designed for use in ducted HVAC zoning systems. This damper controls airflow to a single zone by moving between fully open and fully closed positions, allowing the system to direct conditioned air only where it is needed. Sized at 26 x 18 inches for the duct opening, it ships in packaging that measures 35 inches wide, 21 inches tall, and 7 inches deep. Licensed HVAC technicians install this damper as part of a multi-zone forced-air system, typically paired with a zone control board and thermostat.
This assembly is suited for residential and light commercial zoning applications where a single-zone damper is required in a larger rectangular duct. The two-position design makes it compatible with standard zone control panels that call for open/closed operation rather than modulating control. It is typically installed in supply or return duct runs as Zone 1 in a multi-zone layout, and is well suited for new construction or retrofit zoning projects.
Designed as an OEM-style replacement or new-installation damper for ducted forced-air zoning systems requiring a two-position zone damper in a 26 x 18 inch duct opening.
Installation should be performed by a licensed HVAC technician familiar with duct zoning systems. Power down the air handler and zone control panel before wiring or mounting the damper. The damper must be secured to the duct with sheet metal screws and sealed with foil tape or mastic per local mechanical code requirements. Verify actuator wiring matches the zone control board terminals before restoring power.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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