Io Hvac Controls SD-2020 Auxiliary Zone Damper 20x20

Product Description

The IO HVAC CONTROLS SD-2020 is a 20x20 auxiliary zone damper designed to regulate airflow in residential and light commercial HVAC zoning systems. Zone dampers like the SD-2020 open and close within the ductwork to direct conditioned air only to zones calling for heating or cooling, allowing independent temperature control across multiple areas of a building. At 12 pounds and with a blade opening sized for 20x20 duct, this damper is built for standard trunk-and-branch and plenum-style zoned systems. Installation is typically performed by a licensed HVAC technician as part of a complete zoning system retrofit or new construction application.

The SD-2020 is suited for use in ducted forced-air zoning systems where auxiliary dampers supplement a primary zone control setup. It fits 20x20 duct openings and is appropriate for applications requiring additional zone control beyond the base zone panel configuration. The damper is compatible with standard 24-volt zone control systems and zone panels that support auxiliary damper outputs.

Key Features

• 20x20 blade size for direct installation into standard 20x20 duct openings
• Auxiliary zone configuration for expanded multi-zone HVAC system coverage
• Compatible with standard 24-volt zoning control panels
• Robust construction at 12 pounds for durable, long-term duct installation
• Compact profile: 20.75 inches wide, 7.25 inches tall, 26 inches deep for flexible placement in tight duct chases

Compatibility

Designed as an OEM-style auxiliary zone damper replacement or addition for ducted forced-air HVAC zoning systems using standard 20x20 duct connections.

Installation Notes

Installation of the SD-2020 should be performed by a licensed HVAC technician familiar with zoning system wiring and ductwork modification. Always shut down the air handler and de-energize the zone control panel before installing or wiring any damper. Low-voltage wiring connections to the zone panel should comply with NEC guidelines for Class 2 circuits. Verify damper blade orientation and airflow direction before securing the unit in the duct.