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The LAMBRO INDUSTRIES 2677B is a 4-inch brown louvered face plate used to finish and protect duct exhaust terminations at exterior walls, soffits, or interior grille locations. The louvered design allows air to pass through while helping to block backflow when the connected fan or blower is not running. This type of cover plate is a standard component in residential and light commercial ventilation installations, including dryer vents, bathroom exhaust fans, kitchen range hoods, and general HVAC duct terminations. Installation is typically handled by HVAC technicians, sheet metal contractors, or plumbers completing ventilation rough-ins.
The 2677B is suited for 4-inch round duct systems commonly found in residential exhaust ventilation applications. The brown finish blends with standard exterior trim or siding in many residential settings. It ships polybagged and is available in a package quantity of 12 units, making it a practical stocking item for contractors running multiple installations or service calls.
Designed as an OEM-style replacement or new-installation cover for standard 4-inch round exhaust duct terminations used in residential and light commercial ventilation systems.
This face plate should be installed by a qualified HVAC technician or sheet metal contractor following applicable local mechanical codes. Shut off and lock out the associated fan or air-handling equipment before fitting the cover plate. Ensure the duct opening is clean and free of obstructions before securing the plate. Sealant or caulk may be applied around the perimeter on exterior installations to prevent air and moisture infiltration.
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