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The METAL-FAB mffg424 is a floor-type filter grille designed for residential and light commercial ventilation systems. Constructed from sheet metal with a brown powder-coated finish, it fits into standard floor openings to provide a return-air intake point while accepting a filter insert. The grille measures 24 inches in length by 4 inches in width, making it a fit for narrow floor register openings. Edges are finished without sharp surfaces, reducing the risk of cuts during handling and installation. Each unit is hand inspected before packaging.
This grille is suited for forced-air HVAC systems where the return-air or supply register is located in the floor. The brown powder-coated finish blends with wood and laminate flooring common in residential settings. HVAC installers and service technicians use this grille as a direct component of the duct termination at the floor surface, pairing it with a compatible filter to maintain air quality at the register level.
Designed as an OEM-style replacement or new-installation floor filter grille for residential and light commercial forced-air ventilation systems requiring a 4-inch by 24-inch floor register opening.
Floor filter grilles are typically installed by HVAC technicians or qualified installers. Power down the HVAC system at the thermostat and disconnect power at the air handler or furnace before working on the duct termination. Ensure the floor opening dimensions match the grille before securing in place. Follow local mechanical codes for register placement and filter sizing requirements.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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