Io Hvac Controls cd-2108 Rectangular Zone Damper 21x8

Product Description

The IO HVAC CONTROLS cd-2108 is a rectangular zone damper designed for use in ducted HVAC zoning systems. Sized at 21 x 8 inches, it incorporates a Belimo 3-wire actuator for reliable, motorized airflow control. Zone dampers like this one regulate conditioned air delivery to individual zones within a residential or light commercial system, allowing independent temperature management in different areas of a building. Licensed HVAC technicians and zoning system installers are the primary trades working with this component.

The cd-2108 is sized for rectangular duct applications at 21 x 8 inches, matching common duct trunk and branch dimensions found in residential and light commercial forced-air systems. The factory-mounted Belimo 3-wire actuator eliminates the need for a separate actuator installation, making it suitable for new construction and retrofit zoning projects. This damper is specifically referenced for Carrier and Bryant system applications.

Key Features

• 21 x 8 inch rectangular duct size for common trunk and branch applications
• Factory-mounted Belimo 3-wire actuator included
• Motorized damper blade for precise airflow zone control
• Designed for Carrier and Bryant ducted zoning systems
• Eliminates separate actuator sourcing and field mounting

Compatibility

Designed for use in Carrier and Bryant rectangular duct zoning systems requiring a 21 x 8 inch damper with a Belimo 3-wire actuator.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with zoning system wiring and duct modification. Shut down the air handling unit and de-energize the zone control panel before beginning installation. Follow the zoning system manufacturer wiring diagram for proper 3-wire actuator connections. Duct penetrations and damper fitment should be sealed according to local mechanical codes to prevent air bypass.

Technical Specifications

• Damper Size: 21 x 8 inches
• Actuator Type: Belimo 3-Wire
• Damper Shape: Rectangular

Standard Information

• Brand: IO HVAC CONTROLS
• Manufacturer Part Number: cd-2108