Southwark Metal 31PF-24GA_4X12 Duct Plaster Frame 4x12

Product Description

The SOUTHWARK METAL 31PF-24GA_4X12 is a sheet metal duct plaster frame boot rail designed for return air duct terminations in residential and light commercial HVAC installations. Formed from hot dip galvanized steel at 24 gauge, this plaster frame provides a rigid, corrosion-resistant border that holds the duct boot flush against drywall or plaster surfaces during and after finishing. The 4-inch by 12-inch frame size accommodates standard return air boot openings, giving installers a clean, secure perimeter that prevents wall material from crumbling into the duct opening. HVAC sheet metal mechanics and duct installers rely on this type of component to produce a finished, code-compliant wall termination.

This plaster frame boot rail is used where return air grilles terminate at finished wall or ceiling surfaces in forced-air HVAC systems. It is installed during the rough-in phase, set in place before drywall compound or plaster is applied, so the frame becomes embedded in the finished surface. The 4-inch by 12-inch opening suits common residential return air layouts. It meets ACCA and SMACNA applicable standards, making it appropriate for installations that require documented compliance with industry duct construction guidelines.

Key Features

• Hot dip galvanized steel construction resists corrosion in wall cavities and humid environments
• 24 gauge material thickness provides rigidity without excessive weight during installation
• 4-inch by 12-inch frame size fits standard return air boot openings
• Designed for return air applications in forced-air HVAC duct systems
• Meets ACCA and SMACNA applicable standards for sheet metal duct construction

Compatibility

Designed as an OEM-style replacement and new-construction component for standard 4-inch by 12-inch return air boot terminations in residential and light commercial forced-air HVAC duct systems.

Installation Notes

Installation is performed by licensed HVAC mechanics or sheet metal workers during the duct rough-in phase, prior to drywall or plaster finishing. Secure the frame to the framing or boot before wall finishing begins so the flange becomes properly embedded. Verify the duct boot is fully seated and fastened before applying wall compound. Follow SMACNA and ACCA duct construction standards for fastener type and spacing on sheet metal assemblies.

Technical Specifications

• Frame Size: 4 inches x 12 inches
• Material: Hot Dip Galvanized Steel
• Material Thickness: 24 Gauge
• Type: Return Air
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 31PF-24GA_4X12