Southwark Metal FB_14-1/2X28-1/2 Furnace Return Air Box

Product Description

The SOUTHWARK METAL FB_14-1/2X28-1/2 is a sheet metal furnace return air box designed to connect the return air side of a forced-air furnace to the duct system. Fabricated from hot dip galvanized steel, this box provides a rigid, corrosion-resistant transition point between the furnace cabinet and the return air plenum or duct run. It measures 14.5 inches by 28.5 inches and is sized to accept a standard 14 x 25 filter. HVAC technicians and sheet metal installers use this type of component in residential forced-air heating and cooling systems to establish a clean, sealed return air path back to the air handler or furnace.

This furnace box is suited for residential forced-air systems where a dedicated return air enclosure is required at the base or side of an upflow or downflow furnace. The 14 x 25 filter compatibility makes it practical for installations where filter access is integrated directly into the return air box rather than at a remote grille or rack. It is commonly installed in new construction and replacement applications by licensed HVAC contractors and sheet metal mechanics working to ACCA and SMACNA standards.

Key Features

• Hot dip galvanized steel construction resists corrosion in return air environments
• Sized at 14.5 x 28.5 inches for precise fitment in standard furnace return air openings
• Accepts a standard 14 x 25 filter for integrated filtration at the unit
• Fabricated to ACCA and SMACNA applicable standards
• Rigid sheet metal construction maintains duct integrity and supports sealing with mastic or foil tape

Compatibility

Designed as an OEM-style sheet metal return air box for residential forced-air furnace installations requiring a 14.5 x 28.5 inch return air opening with integrated 14 x 25 filter accommodation.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified sheet metal mechanics. Shut down and lock out the furnace and air handler before beginning any duct or cabinet work. All joints should be sealed with UL-listed foil tape or duct mastic to meet ACCA and SMACNA leakage standards. Fastener and sealing requirements may be governed by local mechanical codes; verify compliance before commissioning the system.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size A: 14.5 inches x 28.5 inches
• Type: Return Air
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: FB_14-1/2X28-1/2