Southwark Metal USBR8222418 Unit Support Box R-8 Insulation 22 Inches X 24 Inches X 18 Inches

Product Description

The Southwark Metal USBR8222418 is a unit support box built with R-8 insulation and designed for use in forced-air HVAC systems. This box measures 22 inches wide by 24 inches long by 18 inches tall, making it a solid-footprint solution for supporting air handling units, fan coil units, and similar HVAC equipment in residential and light commercial applications. Unit support boxes play a critical role in duct system design. They create a stable, insulated plenum base beneath the air handler, connecting the return and supply airflow paths while minimizing heat gain and heat loss at the equipment connection point. Without a properly insulated support box, energy efficiency suffers and condensation problems can develop in unconditioned spaces like attics, crawlspaces, and mechanical rooms. The R-8 insulation rating on the USBR8222418 meets or exceeds current energy code requirements for duct insulation in many jurisdictions. R-8 insulation is commonly specified for ducts located outside conditioned space, helping HVAC systems maintain supply air temperature and reduce overall system load. Southwark Metal is a well-established name in sheet metal ductwork and fittings, trusted by HVAC contractors and sheet metal fabricators across the industry. Their unit support boxes are built to standard dimensions that align with common air handler footprints, simplifying installation and reducing field modification time. The USBR8222418 is a fixed-dimension, non-adjustable box, meaning it is pre-fabricated to exact size and ready for installation without on-site resizing. This makes it a reliable drop-in component for new construction and equipment replacement projects. HVAC technicians, sheet metal installers, and mechanical contractors working on residential or commercial systems will find this unit support box a straightforward, code-compliant solution for equipment support and duct insulation at the air handler connection.

• R-8 insulation rating meets energy code requirements for ducts in unconditioned spaces
• Fixed dimensions of 22 inches x 24 inches x 18 inches for consistent, reliable fit at the air handler
• Pre-fabricated, non-adjustable design reduces installation time and field modifications

Product Highlights

The Southwark Metal USBR8222418 unit support box delivers a fully insulated, code-compliant base for air handlers and fan coil units, combining R-8 thermal performance with precise, ready-to-install dimensions that speed up HVAC system installations.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: USBR8222418

Technical Specifications

• Insulated: Yes
• Insulation Rating: R-8
• Width: 22 inches
• Length: 24 inches
• Height: 18 inches
• Adjustable: No