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The MM MANUFACTURING 601-10X8X9 is a sheet metal register box with flange designed for use in residential and light commercial forced-air duct systems. It connects supply ductwork to a wall, floor, or ceiling register opening, providing a clean transition point and a secure surface for register grille attachment. The integral flange simplifies grille mounting and helps seat the register face flush against the finished surface. HVAC installers and sheet metal contractors handle this component during new construction rough-in and duct replacement work.
This register box is suited for supply-air termination points in residential forced-air heating and cooling systems. It fits into standard framed cavities and connects to round or rectangular duct takeoffs depending on the installation layout. The flange design is appropriate for floor, wall, or ceiling applications where a finished register face must be secured reliably. Installers use it during new construction, remodel duct runs, and register relocation projects.
Designed as an OEM-style replacement or new-construction component for standard residential and light commercial forced-air supply duct termination points requiring a register box with flange.
Installation is typically performed by a licensed HVAC technician or sheet metal contractor. Power down the air handling unit and verify the system is off before working in the duct system. Secure the box to framing members and seal all duct connections with approved mastic or metal-foil tape per local mechanical code requirements. Do not compress or deform the flange during installation, as this will affect register seating.
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