Southwark Metal 4R813142048 Custom Plenum R8 Insulated 13.25 Inches X 20 Inches X 48 Inches

Product Description

The Southwark Metal 4R813142048 is a Model 4 Custom Plenum designed for HVAC duct systems where a high-performance, insulated transition is required. This plenum measures 13.25 inches wide by 20 inches long by 48 inches tall, giving HVAC installers and sheet metal contractors a large-format plenum well suited to commercial and residential air distribution applications. The unit ships knocked down in 3 pieces, making it easier to transport and maneuver through tight job-site spaces before final assembly. Fabricated from 26-gauge hot-dipped galvanized steel meeting ASTM A653 CS Type B standards, this plenum is built for durability in both supply and return air plenum configurations. The galvanized coating resists corrosion, extending service life in demanding mechanical room environments. R8 insulation is factory-installed using glue and pins, delivering strong thermal performance that helps reduce heat gain or loss across the plenum body. This level of insulation meets or supports energy code requirements commonly enforced on commercial HVAC projects. The sides of the plenum are beaded left to right, with approximately 8 inches to 10 inches of space between beads, which varies slightly by plenum size. These beads add structural rigidity to the sheet metal panels without adding significant weight. The plenum is not flanged, so installers can connect it using standard drive and S-cleat methods or other field-fabricated connections. At 15.7 pounds, this unit is manageable for a two-person installation crew. HVAC professionals, sheet metal workers, and mechanical contractors will find this plenum a dependable solution for custom air handler connections, rooftop unit transitions, and built-up duct systems requiring R8 thermal insulation compliance.

• Factory-installed R8 insulation applied with glue and pins for reliable thermal performance
• 26-gauge hot-dipped galvanized steel per ASTM A653 CS Type B for corrosion resistance and long service life
• Ships knocked down in 3 pieces for easier handling and job-site transport

Product Highlights

The Southwark Metal 4R813142048 Custom Plenum delivers R8 insulated, galvanized steel construction in a large 13.25 inches x 20 inches x 48 inches format, purpose-built for HVAC duct system installations requiring durable, energy-code-compliant air distribution components.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 4R813142048

Technical Specifications

• Model: Custom Plenum Model 4
• Width: 13.25 inches
• Length: 20 inches
• Height: 48 inches
• Weight: 15.7 pounds
• Material: Hot Dipped Galvanized Steel
• Steel Standard: ASTM A653 CS Type B
• Gauge: 26 GA
• R-Value: R8
• Insulated: Yes
• Flanged: No
• Galvanized: Yes
• Ships As: 3 pieces knocked down
• Country of Origin: USA
• Prop 65: Yes
• Unit of Measure: EA