Southwark Metal GFFB61425 Furnace Filter Base 6x14x25 in

Product Description

The SOUTHWARK METAL GFFB61425 is a flanged furnace filter base designed to house standard 6-inch x 14-inch x 25-inch filters in forced-air heating and cooling systems. Fabricated from 22-gauge galvanized steel, this filter base provides a rigid, corrosion-resistant enclosure that maintains proper airflow alignment between the duct and the air handler or furnace cabinet. The flanged design allows for secure connection to adjoining ductwork or equipment, reducing bypass air and keeping filtration effective. HVAC technicians install this base as part of a complete air distribution system where a dedicated filter housing is needed upstream of the blower or coil section.

This filter base is suited for residential and light commercial gas furnace installations where fan and coil units require a fixed, non-adjustable filter housing. It accepts a 14-inch x 25-inch x 6-inch filter and is built to integrate into sheet metal duct systems. The unit is not insulated, making it appropriate for interior installations where condensation on duct surfaces is not a concern. Installers working on new construction or replacement air handling setups will find this base compatible with standard flanged duct connections common in forced-air systems.

Key Features

• 22-gauge galvanized steel construction for corrosion resistance and structural rigidity
• Flanged design for secure duct and equipment connections with minimal air bypass
• Accepts 14-inch x 25-inch x 6-inch filters for high-capacity filtration
• Fixed, non-adjustable configuration for consistent fitment in standard installations
• Not insulated, suited for conditioned-space or interior duct applications

Compatibility

Designed as an OEM-style replacement or new-installation filter base for residential and light commercial gas furnace and fan coil unit systems requiring a 14-inch x 25-inch x 6-inch flanged filter housing.

Installation Notes

Installation should be performed by a qualified HVAC technician. Power down the furnace or air handler at the disconnect and thermostat before beginning any duct or cabinet work. Secure the flanged connections to adjoining ductwork using sheet metal screws and seal all joints with UL-listed foil tape or mastic per local mechanical code requirements. Confirm filter direction and airflow arrow orientation before closing up the cabinet.

Technical Specifications

• Filter Size: 14 inches x 25 inches x 6 inches
• Height: 6 inches
• Width: 14.25 inches
• Length: 28.625 inches
• Weight: 14 pounds
• Material: Galvanized Steel
• Gauge: 22 GA
• Flanged: Yes
• Adjustable: No
• Insulated: No
• UPC: 099273686455

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: GFFB61425