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The LUKJAN CA50291420A is a sheet metal furnace box used in residential and light commercial HVAC duct systems. Furnace boxes, also called plenum or transition boxes, connect the furnace or air handler cabinet to the supply or return duct run. This unit measures 29 x 14 x 20 inches, making it suited for standard residential furnace openings where a direct rectangular fitting is required. HVAC sheet metal installers and duct fabricators are the primary trades that source and install this component during new construction or system replacement work.
The CA50291420A fits into the furnace and air handler fittings category, specifically within the furnace box segment. It is typically used in residential forced-air heating and cooling systems where a pre-fabricated rectangular box is needed to cap, connect, or transition at the furnace cabinet. The 29 x 14 x 20 inch profile accommodates common residential unit sizes and standard duct configurations found in single-family and light commercial applications.
Designed as an OEM-style sheet metal furnace box for use in residential and light commercial forced-air HVAC systems requiring a 29 x 14 x 20 inch rectangular fitting at the furnace or air handler cabinet connection point.
Installation is performed by licensed HVAC technicians or qualified sheet metal mechanics. Power down the furnace or air handler and shut off all associated electrical circuits before beginning any duct connection work. Secure all joints with appropriate fasteners and seal with listed duct sealant or mastic to meet code requirements under ACCA standards and applicable mechanical codes. Verify the box dimensions align with the cabinet opening and connected ductwork before final fastening.
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