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The SEAL-TITE 3516-412 is a galvanized sheet metal boot frame designed for use in residential and light commercial HVAC duct systems. It provides a rigid, dimensionally consistent transition point where round flex or rigid duct connects to a floor, wall, or ceiling register boot. Constructed from 26-gauge galvanized metal, this frame delivers corrosion resistance and structural stability in air distribution applications. HVAC installers and sheet metal contractors use this component during new construction and system retrofit work to ensure a clean, code-compliant duct termination at the register opening.
The 3516-412 is suited for residential forced-air heating and cooling systems where a 12-inch by 4-inch boot frame is required at the supply or return register location. It is built to align with 16-inch on-center framing layouts, making it compatible with standard residential wall and floor framing configurations. This frame is applicable under CCR/Title 24, IECC, HARDI, ACCA, AHREXPO, and ADI standards, making it appropriate for jobs in jurisdictions that require documented compliance with those specifications.
Designed as an OEM-style sheet metal boot frame for residential and light commercial forced-air duct systems requiring a 12-inch by 4-inch register termination frame at 16-inch on-center framing.
Installation is typically performed by licensed HVAC technicians or sheet metal contractors. Shut down the air handling system before making any duct connections or modifications. Secure the frame to framing members per local mechanical code requirements, referencing IECC and ACCA guidelines where applicable. Do not deform the frame during installation, as distortion can compromise the seal between the boot and the register face.
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