Seal-tite 3524-412 Sheet Metal Boot Frame 12x4 in 26 Gauge

Product Description

The SEAL-TITE 3524-412 is a 26-gauge galvanized sheet metal boot frame designed to provide a rigid, code-compliant transition between round ductwork and rectangular floor or ceiling register openings. Measuring 12 inches in length by 4 inches in width, this boot frame serves as the structural mounting surface for supply or return air registers in residential and light-commercial HVAC duct systems. The galvanized steel construction resists corrosion in unconditioned spaces such as crawl spaces, basements, and attic cavities. It is a standard component installed by HVAC sheet metal technicians and mechanical contractors during new construction or duct replacement projects.

This boot frame is suited for residential new-construction and retrofit HVAC duct installations where a 4-by-12-inch register opening is required. It is engineered for compatibility with 24-inch on-center framing layouts, making it a straightforward fit in standard wood-framed floor and wall assemblies. The 3524-412 meets applicable standards including CCR/Title 24, IECC, HARDI, and ACCA requirements, supporting installations in jurisdictions where energy code compliance documentation is required.

Key Features

• 26-gauge galvanized sheet metal construction for corrosion resistance in unconditioned spaces
• Frame size of 12 inches length by 4 inches width fits standard residential register openings
• Designed for 24-inch on-center framing layouts for straightforward rough-in
• Meets CCR/Title 24, IECC, HARDI, and ACCA applicable standards
• Part of the SEAL-TITE 3524 series for consistent fitment across a product family

Compatibility

Designed as an OEM-style sheet metal boot frame for residential and light-commercial HVAC duct systems requiring a 4-by-12-inch register boot opening on 24-inch on-center framing.

Installation Notes

Installation is performed by licensed HVAC sheet metal technicians or mechanical contractors. Power down the air handling system and verify the duct system is de-pressurized before cutting into existing ductwork or framing. Secure the boot frame to framing members using appropriate fasteners per local mechanical and building codes, referencing ACCA and IECC guidelines where applicable. Seal all seams with code-approved mastic or metal tape to maintain duct system integrity and meet Title 24 or IECC leakage requirements.

Technical Specifications

• Frame Size: 12 inches length x 4 inches width
• Material: Galvanized Metal
• Material Thickness: 26 Gauge
• On-Center Spacing: 24 inches
• Applicable Standards: CCR/Title 24, IECC, HARDI, ACCA, AHREXPO, ADI
• Series/Model: 3524
• UPC: 65641456977

Standard Information

• Brand: SEAL-TITE
• Manufacturer Part Number: 3524-412