Southwark Metal 4R81314161248 Custom Plenum R8 Insulated 13 1/4 Inches X 16 1/2 Inches X 48 Inches Model 4

Product Description

The Southwark Metal 4R81314161248 is a Model 4 Custom Plenum built for HVAC air distribution systems where precise sizing and strong thermal performance are required. This plenum measures 13 1/4 inches in length, 16 1/2 inches in width, and 48 inches in height, giving installers a large-format duct plenum suited for commercial and residential HVAC applications. The unit is insulated to R8, which provides effective resistance to heat transfer and helps maintain conditioned air temperature as it moves through the duct system. R8 insulation is commonly required in high-efficiency HVAC builds and energy code-compliant installations, making this plenum a practical choice for systems that must meet strict thermal standards. The plenum is fabricated from 26-gauge hot-dipped galvanized steel meeting ASTM A653 CS Type B standards. This material resists corrosion and holds up in both attic and mechanical room environments where humidity and temperature swings are common. The galvanized coating protects the steel over the long service life of the duct system. The insulation is attached using glue and pins for a secure, lasting bond. The sides are beaded left to right, with approximately 8 to 10 inches of space between beads, which adds structural rigidity to the panel. This plenum ships knocked down in 3 pieces, making it easier to transport and maneuver into tight spaces before final assembly on the job. It is not flanged. HVAC technicians and sheet metal contractors working on custom duct layouts will find this plenum well-suited for system builds requiring non-standard dimensions and high R-value insulation. It is manufactured in the USA.

• R8 insulation rating meets energy code requirements for high-efficiency HVAC systems
• 26-gauge hot-dipped galvanized steel per ASTM A653 CS Type B for corrosion resistance and long-term durability
• Ships knocked down in 3 pieces for easier handling and installation in tight spaces

Product Highlights

The Southwark Metal 4R81314161248 Custom Plenum delivers R8 insulated, 26-gauge galvanized steel construction in a large 13 1/4 inches x 16 1/2 inches x 48 inches format, built to meet thermal performance and structural demands on professional HVAC jobs.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 4R81314161248

Technical Specifications

• Model: Model 4 Custom Plenum
• Size: 13 1/4 inches x 16 1/2 inches x 48 inches
• Length: 13.25 inches
• Width: 16.5 inches
• Height: 48 inches
• R-Value: R8
• Material: Galvanized Steel
• Gauge: 26 GA
• Galvanized: Yes
• Insulated: Yes
• Flanged: No
• Weight: 25 pounds
• Dimensional Weight: 77 pounds
• Country of Origin: USA
• Unit of Measure: EA
• Prop 65: Yes