Southwark Metal 85r84106 Insulated Ceiling Box R8

Product Description

The SOUTHWARK METAL 85r84106 is an insulated ceiling box designed for HVAC duct termination applications in residential and light commercial construction. Built from hot-dipped galvanized steel per ASTM A653 CS Type B, this unit features a top outlet with a bottom flange configuration. The box shell is formed from 30-gauge (.012 inch) steel, while the collar uses 28-gauge (.015 inch) steel for added rigidity. R8 insulation (2 inches thick) is factory-applied, making this unit suitable for installations where thermal performance and energy code compliance are required. The 4-inch depth box and 3-inch long collar with bead provide a stable, consistent connection point at the ceiling plane.

This ceiling box is used in forced-air HVAC systems where a ceiling-mounted supply outlet is required. The bottom flange sits flush against drywall or ceiling board, with a 1/2-inch drywall flange and a 2-inch flange on the standard side. The overall height of the assembly is 7.5 inches, accommodating typical joist-bay installations. HVAC installers and sheet metal contractors use this box in new construction and renovation projects where insulated ceiling diffuser boxes are specified for attic-side duct connections. The nominal duct opening is 4 inches x 10 inches x 6 inches.

Key Features

• Hot-dipped galvanized steel construction per ASTM A653 CS Type B for corrosion resistance
• R8 insulation (2 inches thick) factory-applied to meet thermal performance requirements
• 30-gauge (.012 inch) box body with 28-gauge (.015 inch) collar for structural integrity
• 3-inch long collar with bead for secure duct connection
• 1/2-inch drywall flange and 2-inch bottom flange for flush ceiling installation
• 7.5-inch overall height fits standard joist-bay depth requirements

Compatibility

Designed as an OEM-style replacement or new-installation ceiling box for residential and light commercial forced-air HVAC duct systems requiring a top-outlet, bottom-flange insulated ceiling box with a 4-inch x 10-inch x 6-inch opening.

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal contractors. Power down the air handler and close the system dampers before securing the box in the ceiling cavity. The flange on the long side may vary — consult the factory before ordering if non-standard flange dimensions are required. Follow all applicable local mechanical codes and energy codes when specifying insulation levels for ceiling duct terminations.

Technical Specifications

• Insulation Rating: R8
• Insulation Thickness: 2 inches
• Box Opening: 4 inches x 10 inches x 6 inches
• Box Depth: 4 inches
• Overall Height: 7.5 inches
• Collar Length: 3 inches with bead
• Drywall Flange: 0.5 inches
• Bottom Flange Width: 2 inches
• Box Gauge: 30 gauge (.012 inches)
• Collar Gauge: 28 gauge (.015 inches)
• Material: Hot-Dipped Galvanized Steel (ASTM A653 CS Type B)
• Outlet Position: Top Outlet
• Flange Position: Bottom Flange
• Unit of Measure: Each

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 85r84106