Io Hvac Controls ZD-2412-BM Zone Damper 24x12 Bottom Mount

Product Description

The IO HVAC CONTROLS ZD-2412-BM is a modulating commercial zone damper designed to regulate airflow in multi-zone HVAC duct systems. Measuring 24 inches wide by 12 inches tall with a 6-inch depth, this bottom-mount damper provides proportional airflow control rather than simple open/close operation, making it suitable for variable air volume and zoning applications. At 11.5 pounds, it is a substantial unit built for commercial-grade installation. Licensed HVAC technicians and mechanical contractors install this type of damper as part of a broader zone control system coordinated by a zone control board or building automation controller.

This damper is intended for commercial HVAC zoning applications where precise, modulating airflow control is required across multiple zones. The bottom-mount configuration suits installations where actuator access from the underside of the duct is the practical approach. Typical applications include light commercial buildings, multi-zone rooftop unit systems, and retrofit zoning projects where a 24 x 12 inch duct opening is present. It operates in conjunction with a compatible zone controller or modulating actuator signal, typically a 2-10 VDC or 4-20 mA control input depending on system configuration.

Key Features

• Modulating operation for proportional airflow control in variable-demand zone systems
• Bottom-mount design for actuator access from the underside of the duct
• 24 x 12 inch face dimensions to match standard commercial duct openings
• 6-inch depth accommodates typical commercial duct throat clearances
• 11.5-pound construction reflects commercial-grade build quality

Compatibility

Designed as an OEM-style replacement or new-installation modulating zone damper for commercial HVAC duct systems requiring a 24 x 12 inch bottom-mount damper.

Installation Notes

Installation should be performed by a licensed HVAC technician or mechanical contractor familiar with commercial zoning systems. Shut down the air handling unit and de-energize all associated control wiring before installing or replacing a zone damper. Confirm that the control signal type from the zone controller matches the actuator requirements for this damper before energizing. Follow all applicable local mechanical codes and manufacturer wiring guidelines when connecting the modulating control circuit.