The Unico System UPC-61-3642 Supply Air Plenum Adapter 9 in

Product Description

The THE UNICO SYSTEM UPC-61-3642 is a round, rigid supply air plenum adapter designed for use with high-velocity air handler systems in residential and light commercial applications. Constructed from galvanized steel, this adapter connects the air handler cabinet to the supply air distribution plenum, serving as a critical transition component in the airstream. The 9-inch round opening accommodates standard high-velocity trunk connections, and the unit measures 20 inches in length with a 12-inch width profile. Licensed HVAC technicians installing or replacing Unico-style high-velocity systems will find this adapter engineered to the dimensional and airflow requirements of 3- to 3.5-ton system configurations.

This plenum adapter is intended for use in high-velocity, small-duct HVAC installations where the air handler discharges conditioned air into a round supply plenum before distribution through flexible mini-ducts. It is suited for new construction installs and retrofit projects in tight-space or historic building applications where small-duct high-velocity systems are specified. The galvanized steel construction handles the static pressure and airflow velocities characteristic of high-velocity distribution systems. AHRI-applicable standards apply to this component.

Key Features

• 9-inch round opening sized for high-velocity supply plenum connections on 3- to 3.5-ton systems
• Galvanized steel construction for corrosion resistance and structural rigidity in air handler environments
• Rigid form factor maintains dimensional stability under high-velocity airflow conditions
• 20-inch length provides adequate transition depth for proper plenum attachment
• Meets applicable AHRI standards for air distribution components

Compatibility

Designed as an OEM-style supply air plenum adapter for high-velocity air handler systems rated at 3 to 3.5 tons with a 9-inch round supply connection.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with high-velocity small-duct system requirements. Disconnect and lock out all electrical power to the air handler before beginning any plenum or cabinet work. Secure all plenum connections per local mechanical code requirements and verify that all seams are properly sealed to prevent air leakage. Do not modify the adapter collar dimensions, as changes to the opening size will affect system static pressure and airflow performance.

Technical Specifications

• Shape: Round, Rigid
• Opening Diameter: 9 inches
• Length: 20 inches
• Width: 12 inches
• Height: 9 inches
• Weight: 3 pounds
• Material: Galvanized Steel
• Applicable Standard: AHRI

Standard Information

• Brand: THE UNICO SYSTEM
• Manufacturer Part Number: UPC-61-3642