Io Hvac Controls SC-ZD-18 Commercial Zone Damper 18in

Product Description

The IO HVAC CONTROLS SC-ZD-18 is an 18-inch modulating commercial zone damper designed to regulate airflow in zoned HVAC distribution systems. It provides precise, variable blade positioning rather than simple open-close operation, allowing the system to deliver the correct airflow volume to each zone based on demand. At 18 x 8.125 x 18 inches and 14.3 pounds, this is a substantial damper suited for commercial duct runs where accurate airflow control directly affects system efficiency and occupant comfort. Licensed HVAC technicians and mechanical contractors are the primary installers.

This damper is used in commercial zoning applications where modulating control is required rather than two-position switching. Typical installations include multi-zone rooftop unit systems, variable air volume distribution networks, and commercial retrofit zoning projects where individual zones must be balanced independently. Its 18-inch round size accommodates larger commercial duct trunk lines and branch feeds that exceed typical residential sizing. The SC-ZD-18 is appropriate for new construction mechanical systems as well as service replacement in existing commercial zoning installations.

Key Features

• Modulating operation allows variable blade positioning for precise airflow control
• 18-inch diameter fits larger commercial duct runs
• Compact depth of 18 inches suits standard duct configurations
• 14.3-pound construction indicates heavy-duty commercial-grade build
• 8.125-inch height profile accommodates typical mechanical room and plenum clearances

Compatibility

Designed as an OEM-style modulating zone damper for commercial HVAC zoning systems requiring 18-inch round duct damper control.

Installation Notes

Installation should be performed by a licensed HVAC technician or mechanical contractor familiar with commercial zoning systems and applicable mechanical codes. Disconnect and lock out power to the air handling unit and zone controller before installing or wiring the damper actuator. Verify duct dimensions and confirm adequate clearance around the damper body before securing it in the duct run. Follow the zone controller manufacturer wiring diagram for modulating signal connections and do not apply line voltage to low-voltage control terminals.

Technical Specifications

• Damper Size: 18 inches
• Width: 18 inches
• Height: 8.125 inches
• Depth: 18 inches
• Weight: 14.3 pounds

Standard Information

• Brand: IO HVAC CONTROLS
• Manufacturer Part Number: SC-ZD-18