Southwark Metal 86r84106 Slant Top Ceiling Box 4x10x6

Product Description

The SOUTHWARK METAL 86r84106 is a slant top insulated ceiling box designed to transition from round pipe or flexible duct to an air register at ceiling level in applications with a sharply pitched roof. The box is constructed from hot-dipped galvanized steel per ASTM A653 CS Type B, providing corrosion resistance in attic and ceiling environments. The box shell is formed from 30-gauge steel (0.012 inches) while the collar is 28-gauge (0.015 inches). R-8 insulation with 2 inches of thickness is built in, limiting heat gain and condensation in unconditioned spaces. This fitting is installed by HVAC technicians during new construction or retrofit duct system work.

This ceiling box is suited for residential HVAC duct systems where supply air must be delivered through a slanted or pitched ceiling plane. The slant top geometry allows the duct to approach at an angle while still presenting a flat, register-ready opening at the ceiling surface. It includes a 2-inch flange and a 0.5-inch drywall flange for clean integration with finished ceiling material. The flange on the long side varies in depth to accommodate the roof pitch. The 3-inch collar with bead provides a secure connection point for round pipe or flexible duct. This fitting is appropriate for residential forced-air systems where the supply register is located in a sloped ceiling area.

Key Features

• Slant top geometry allows duct transition at pitched ceiling planes without cutting the collar
• R-8 insulation (2 inches) reduces heat transfer in attic-side installations
• Hot-dipped galvanized steel per ASTM A653 CS Type B for corrosion resistance
• 30-gauge box body with 28-gauge collar for structural integrity at the duct connection
• 2-inch flange and 0.5-inch drywall flange for clean finished-ceiling fit
• 3-inch collar with bead for secure round pipe or flex duct attachment

Compatibility

Designed as an OEM-style replacement or new-installation fitting for residential forced-air supply duct systems terminating at sloped or pitched ceilings with round pipe or flexible duct connections.

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal workers. Power down the air handler and verify the system is de-energized before working inside the duct system. Secure the collar to the round pipe or flexible duct using approved mechanical fasteners and mastic sealant or metal tape per local mechanical code requirements. Ensure the drywall flange seats flush against the finished ceiling surface before securing the air register.

Technical Specifications

• Box Dimensions: 4 inches x 10 inches x 6 inches
• Insulation Rating: R-8
• Insulation Thickness: 2 inches
• Material: Hot-dipped galvanized steel, ASTM A653 CS Type B
• Box Gauge: 30 gauge (0.012 inches)
• Collar Gauge: 28 gauge (0.015 inches)
• Flange Width: 2 inches
• Drywall Flange: 0.5 inches
• Collar Length: 3 inches with bead

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 86r84106