iO HVAC Controls RRD Series Round Retrofit Damper

The iO HVAC Controls RRD Series round retrofit damper makes adding or upgrading HVAC zoning fast and simple, dropping into existing ductwork with minimal disruption. Built for residential and light-commercial systems, it brings precise airflow control and true multi-zone comfort to homes and buildings without a full duct rebuild.

Why Choose the RRD Series

• Fast, simple upgrade — drops into existing ductwork to add zoning with minimal disruption.
• Precise airflow control — brings true multi-zone comfort to homes and buildings without a full duct rebuild.
• Built to last — durable galvanized-steel housing for quiet, dependable performance season after season.

Specifications

• Actuator Type: Spring-Return
• Actuator Voltage: 24V
• Wiring: 2-Wire
• Max Static Pressure: 1.0" WC
• Blade Design: Single-Blade
• Compatible Panels: ESP-400, ESP, ZP2, ZP3, ZP4, ZP6, Saturn UCC

Ideal For

Adding or upgrading HVAC zoning in existing residential and light-commercial ductwork without a full rebuild.