Air Flow Products 5341207 Ceiling Diffuser Boot 4x12

Product Description

The AIR FLOW PRODUCTS 5341207 is a ceiling diffuser boot with rail designed for use in residential and light commercial HVAC duct distribution systems. This boot transitions from round duct collar to a rectangular face opening, allowing a ceiling diffuser or register to be mounted flush against the ceiling. The 7-inch collar connects to the supply trunk or branch duct run, while the 4x12-inch face opening accepts a standard-size register or diffuser grille. Licensed HVAC technicians and sheet metal installers are the typical trade installing this component.

This boot is suited for new construction and replacement applications where a ceiling-mounted supply air outlet is required. It is commonly installed in residential forced-air systems as part of a branch duct layout feeding individual rooms or zones. The integrated rail helps secure and align the diffuser or register face during installation, reducing alignment issues in finished ceiling assemblies. Applications include single-family homes, apartments, and light commercial spaces where standard rectangular ceiling diffusers are specified.

Key Features

• 4x12-inch rectangular face opening accepts standard ceiling diffusers and register grilles
• 7-inch round collar connects directly to branch duct or supply plenum
• Integrated rail provides a mounting surface for the diffuser or register face
• Designed for ceiling-mount orientation in supply air duct systems
• Compact boot profile suits typical residential joist-bay installations

Compatibility

Designed as an OEM-style replacement or new-install fitting compatible with standard 4x12-inch ceiling registers and diffusers paired with a 7-inch round duct collar.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal installer. Power down the air handling unit and close the system dampers before beginning duct work. Secure the boot to framing or blocking above the ceiling plane before connecting flex or rigid duct to the collar, and verify all seams are sealed per local mechanical code requirements. Do not operate the system until all connections are confirmed airtight and the diffuser face is properly seated on the rail.

Technical Specifications

• Face Opening: 4x12 inches
• Collar Diameter: 7 inches
• Mounting Orientation: Ceiling
• Boot Style: Diffuser Boot with Rail

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 5341207