Io Hvac Controls ZD-18 Modulating Zone Damper 18in

Product Description

The IO HVAC CONTROLS ZD-18 is an 18-inch modulating commercial zone damper designed to regulate airflow in variable air volume (VAV) and zoned HVAC distribution systems. It provides precise, incremental blade positioning rather than simple open/close actuation, allowing a building automation system or zone controller to continuously adjust airflow to meet changing load demands. At 14 pounds and an 18-inch blade width, the ZD-18 is sized for commercial duct runs where accurate zone control directly impacts both occupant comfort and system efficiency. HVAC technicians and mechanical contractors are the primary installers.

The ZD-18 is suited for commercial and light-industrial HVAC applications where modulating zone control is required. Typical installations include multi-zone rooftop unit systems, commercial VAV air handling unit distribution networks, and demand-controlled ventilation layouts. The damper fits into ductwork installations where the system design calls for an 18-inch round or equivalent rectangular transition, and it is commonly specified in new construction mechanical work as well as retrofit zone-control upgrades.

Key Features

• Modulating control supports incremental blade positioning for precise airflow management
• 18-inch blade width sized for commercial duct applications
• Compact depth of 8 inches allows installation in space-constrained duct chases
• Robust construction at 14 pounds supports long-term commercial-duty service cycles
• Compatible with standard zone controllers and building automation system outputs

Compatibility

Designed as an OEM-style modulating zone damper for commercial HVAC zoning and VAV distribution systems requiring an 18-inch damper assembly.

Installation Notes

Installation of the ZD-18 should be performed by a licensed HVAC technician or qualified mechanical contractor. De-energize the air handling unit and confirm zero airflow before cutting into the duct and securing the damper. Follow applicable mechanical and building codes, including SMACNA duct installation standards, when fastening the damper housing and sealing duct joints. Do not apply power to the actuator until all ductwork connections are complete and the damper blade moves freely without obstruction.